Chevrolet S-10 - High Idle and Dies After 20min Drive?!

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In this video I bring you along as I have a look at a 1988 Chevrolet S-10 with the big 2.8. The customer states that the vehicle will run like crap and have a really high idle after a 20 minute drive. This thing belongs in a museum haha. Let's see what we find.
-Enjoy!
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Due to factors beyond the control of South Main Auto Repair, it cannot guarantee against unauthorized modifications of this information, or improper use of this information. South Main Auto Repair assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. South Main Auto Repair recommends safe practices when working with power tools, automotive lifts, lifting tools, jack stands, electrical equipment, blunt instruments, chemicals, lubricants, or any other tools or equipment seen or implied in this video. Due to factors beyond the control of South Main Auto Repair, no information contained in this video shall create any express or implied warranty or guarantee of any particular result. Any injury, damage or loss that may result from improper use of these tools, equipment, or the information contained.

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2 июн 2022

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Комментарии : 1,9 тыс.

@WatchWesWork 2 года назад

Now we're talking! When I was 16 and working summers for the village, our "truck" was a red 88 S-10 with the iron duke 4 banger. It had an AM only radio and no power steering. We called it the "S-9". One guy decided he was gonna buff and wax it by hand. He gave up pretty quickly and we drove it the rest of the summer with one shiny fender...

@SouthMainAuto 2 года назад

😂

@21Piloteer 2 года назад

When I was an electrician apprentice back in the early 90's we had a GMC Sonoma shop truck. Iron Duke, manual trans, and no power steering. I hated that f'n truck! lol!

@zx8401ztv 2 года назад

Fender splendor :)

@MegaBbqbbq 2 года назад

I had a "77 PONTIAC SUNBIRD with the 2.5 Iron Duke. Sold it for $100 @188k.

@bonemanmcjames2953 2 года назад

Wes, if your donkey powered internet is working good enough to watch SMA, you better give us a vid!

@Legend_1754 2 года назад

That o2 sensor extraction: oddly satisfying

@drg424 Год назад

Fantastic diagnostic ability, a old army retired teacher always pounded it in our head, what's changed and what could change , Eric reminds me of that teacher. I've got the largest respect for these guys, it's a dying breed , now days we have parts replacers ,not technicians. Hats off to u Eric.

@-BEASTOR- Год назад

Now days people dont have a clue what they are doing. I see it the younger generation. Most of them cant do or know anything.

@darrelfuhrman8217 Год назад

Eric that is the 3rd generation of GM ECM, Engine Control Module. The first had a non replaceable PROM, Programmable Read Only Memory. 2nd generation had the removable PROM. 3rd generation had a PROM & an EPROM, the EPROM, I believe was the limp home for fuel injection or throttle body injection. The hair dryer will not get the circuit board hot to make it cut out. We had a 82 T16, Mini Blazer with 2.8, 700R4, with 120K miles, at 13 months old! It was a mail lady’s outfit. The first one that I ran into, the 3rd one that Chevrolet Technical Assistance ran into. She never had trouble in the winter, started having issues on hot spring days. One time when Ken removed the ECM, it was hot enough that it singed the carpet. I wish that I would have had your scan tools, instead of the KenTool, GM base special tool, OTC is what the tech assist sent us to use. As you were going through, I was remembering the trouble that I was having trying to make tools that now you can buy. Hello from north east Montana. 10 miles from the Canadian border.

@jamesbruno5896 2 года назад

You got the O2 sensor out without breaking the pipe & found a pcm for that relic! I'm impressed, thanks for sharing! Now if you'll excuse me I need an early lunch!

@kevinrenn9123 2 года назад

I believe that deserves an extra helping of brisket

@mxpants4884 2 года назад

I have an O2 sensor to get out tomorrow. It's the first one I have ever personally done now that I'm thinking about it. Wish me luck!

@drp457 2 года назад

Did you go out and buy a lottery ticket that night?

@kramnull8962 2 года назад

@@kevinrenn9123 Roll it up my man!

@jimmydcricket5893 Год назад

Mmm lunch.

@timothyoneill3154 2 года назад

You guys are such salt of the earth people. I drove by your shop one Sunday back in the winter on my way to Cleveland from Great Bend, Pa just to see where all my knowledge was coming from. You have enlightened me more than you will ever know!

@slatsgrobneck7515 2 года назад

The upside down air filter cover - vintage! And that lunch with homemade potato salad, to die for. And ya, we all love Mrs.O, and you too Eric

@vehcor 2 года назад

Hearing you say, "before your time" makes me feel old. I remember working on these new. lol I'm so old, I should be in a home!

@lorrinbarth1969 2 года назад

Your just a kid, The first car I worked on was a '49 chevy.

@mtebaldi1 2 года назад

Yea I was working GM Fremont building cars and trucks 75-80 then was laid off. Americans were buying more foreign cars than domestic back then. So I feel old also bro.

@icuranis4597 2 года назад

I bought one of these trucks brand new, it didn't have the power to pull itself up the hill I lived on lol.

@debbievogel2957 2 года назад

Vehcor no way, do not do the home thing. Count every day as a blessing and keep moving. God bless

@rharris5811 2 года назад

We used to beat on the side of the pcm on these. Most of the time it would die or start missing. Put a ton of computers on these with the replaceable prom.

@JMassengill 2 года назад

The cat has you trained rather well. lol

@fredwalker839 2 года назад

& notice the voice go Saprono !

@henwoopa 2 года назад

Oh, the memories! My first set of wheels in 1999 was a '88 S10. Four cylinder, 2.5L, EFI, 5-speed manual, 2wd. It had a driveway paint job that I would touch up on the fly with a rattle can I kept in the glove box, a piece of 1/2” plywood where the tail gate should have been, if I hit a big enough pothole I would have to pick the radio up off the floor and slide it back in the dash, and I could get the dash lights to come on by giving it a 'Who's the Boss' Tony Danza whack. One time it had sat in my parents' driveway for months while I was away and no one was driving it; all of a sudden I needed a vehicle so we dug it out of a snow bank (literally half buried), boosted it with some jumper cables and my mother's minivan, and I hopped in and drove it two hours to the city where I was living and working and kept driving it everyday for a couple years after that. All that in Nova Scotia Canada salted roads winters. They don't make them like that anymore. I really miss that truck.

@shadetreec6013 2 года назад

The dash whack is called a Fonzarelli, not a Tony Danza

@shadetreetech 2 года назад

I miss my 89 s10 blazer with a 4.3

@henwoopa 2 года назад

@@shadetreec6013 Oh yeah, like when he hit the jukebox? My nickname in high school for a while was the Fonz (a phase with a leather jacket and hair gel). But I have a memory of Tony hitting the roof liner or dash or something in his blue Chevy van to get the radio or something to work. Maybe I'm remembering it wrong.

@what1864 2 года назад

the most valuable thing in life are memories

@sblagg527 2 года назад

@@shadetreec6013 "This bucket of bolts is never gonna get us past that blockade!!"

@nickmcwilliams685 2 года назад

Holy crap, a friend of mine had S-10 blazer that did this. As an electronics tech I was saying, pop the case and shoot it with freeze spray the whole time lol.

@kevincampbell8298 2 года назад

Us electronics techs and our freeze spray. Hey a can of that stuff helped me troubleshoot a lot of test equipment when when I was servicing that stuff!

@MicroSoftner Год назад

Only when needed....

@adriansdigitalbasement 2 года назад

I’m sure others have said, but it’s surely a few leaking capacitors that have eaten the original PCM. Sadly junkyard units will likely be on the same trajectory. A refurb that’s been recapped and had any trace damage repaired may result in more reliability.

@sumduma55 2 года назад

I'm thinking this truck would be a decent candidate for a cardrino or speedrino if it ends up with more problems with the computer.

@mehere8196 2 года назад

I'd also rip off that cover and first have a look at the capacitors. If they look fine I'd take off the pcb and search for bad solder joints. Back in the days I owned a BMW where the entertainment ssystem did such weird things after some time, at hot weather more than in cold weather. BMW's offer was to put in a new radio for more than 1500$. I thanked them for the offer, went home resoldered a few joints and it worked like a charm for the next years untill I sold that car. But for Mr. O. that wouldn't probably be an option because of warranty issues...on the other hand, as you mentioned, if there is a cap-problem this guy will eventually run into some similar issues in the feauture.

@dougkoudelka3089 2 года назад

Absolutely. If you can catch those electrolytics before the leak and kill the traces, its a pretty easy fix if you have some soldering skills.

@kirbyyasha 2 года назад

Wow, Had no idea you watch this channel too Adrian! But absolutely my guess, it's becoming a thing on these old cars. I've recapped a few Ford PCM's and did some trace repairs with success.

@lorrinbarth1969 2 года назад

@@dougkoudelka3089 I recapped an ECU once. I think I was holding my breath the entire time. The breath holding was used in place of soldering skills.

@tomlewis3658 2 года назад

Wow, what a great ending, and what a break that Wilbert's had a PCM available. Also not too shabby that an O2 sensor was readily available. And Mr. O had a scan tool that could read this old OBD-I system, and the know-how to interpret the data, so a win-win-win. But I think in your shop in upstate NY, that Kansas song in the background was really "Rust In The Wind".

@kellyherald1390 2 года назад

Great! Now I have that song with modified lyrics stuck in my head. All our cars are rust in the wind. 😎

@POOKIE5592 2 года назад

Tom Lewis You can retrieve OBD-1 codes with a paperclip.

@pigeonsil240sx 2 года назад

@@POOKIE5592 big difference between pulling codes and seeing live data pids,codes would have done nothing here it was the wonky live data voltages that pointed towards bad ecu,it wasnt even throwing codes otherwise he would had pointed that out in begining for direction to go

@rollingreveler5198 2 года назад

Spoilers!! I haven’t watched it yet! Lol.

@Folsomdsf2 2 года назад

PRetty sure this sucker was just heat cycling the board enough over the years it started fucking some through hole solder joints and probably fixable!

@TheManny1952 2 года назад

Yes, it looks like a cold solder joint. Mr O send the malfunctioning PCM to our friend Ivan he will take care of it. Nice vid.

@fredwalker839 2 года назад

For sure…he will change his mind a few times,,,,but he “allways gets his man!” LOL

@G31mR 2 года назад

I didn't have much hope for this video when it started, but it turned into one of the best SMA vids in recent memory. Thank you.

@Blazer02LS 2 года назад

Yeah the old freezer fix, Been a while since I've seen that one. Remember an 85 S-blazer with this problem, the owner had a hose rigged from the AC duct to a box around the PCM to keep it cold! Good old OBD "high speed" interface... LOL

@hpelisr 2 года назад

Wow what a stroke of luck finding that PCM, great fix Eric, and a thumps up for Mrs. O, the most valuable employee at the shop.

@williamsquires3070 2 года назад

Don’t forget the kids and the cat. 😌 ❤️

@dadtype2339 2 года назад

Love hugs and prayers to you Mrs.O and Family, you two are an awesome and good people, what the world needs!

@markmalikowski4971 2 года назад

Wow! What were the odds of Wilberts having a 31 year old PCM that wasn't junk also. Great diagnosis! Brought back good memories of tooling around a golf course in a S 10. Still don't know how you functioned after lunch. That looked like food coma city.

@roberttroxell4006 Год назад

I just ate and I’m hungry looking at that food. Eric, you Sir are a spoiled man! Somebody should be. 👌🏻

@DrFiero 2 года назад

I’ve had sooo many of these, and similar from that generation. Bought my first dime in 85 I think it was. I learned so much from them! Helped me to eventually become a licensed mechanic.

@m1greg125 2 года назад

Ah the flipped air cleaner trick. Instant HP on a Highschool budget. 😁

@fredwalker839 2 года назад

Fonzi did it too !

@chuckmiller5763 Год назад

Na man, the bumper chrome spray paint was all you needed.

@charliechristie2949 Год назад

I am a retired, lifetime GM dealership employee from Tech to Service and Parts Director....( a little background ). When our products had a widespread problem with drivability, they would come out with a bulletin, a widespread rattle problem, guess what?...Yup, another one page bulletin from the engineers. The point I am getting at is the fix is usually a sheet of paper with the "how to"......Here is the kicker, guys.... The drivability bulletin on the 2.8 in the late 80's was a 36 page book. A freaking BOOK.( I have one as a souvenir ). It was mostly 2.8 V6 engines in cars, but, it was always the 2.8. They never ran perfectly, like the 3.8 V6 did.........

@Stover1928 2 года назад

That was awesome. Thank you for providing the intimate test details and clear explanations of what you are doing and why. I love your videos, and always look forward to the next one.

@esi01 2 года назад

when he was trying to take the O2 sensor off I caught myself screaming, "use the panther pee!" 😂😂😂❤❤❤ I really enjoy his videos!

@mark98070 2 года назад

Love all these OBD1 diags...A true test of a mechanics ability

@ronaldbrosius7488 9 месяцев назад

Man, your grandmother must have been an Amazing mechanic 😅!!(well done Eric great job, and video) thanks for bringing us along. 😊

@sneaks01 9 месяцев назад

Walking through SMA archives. I love seeing old vehicles like this get attention. Back in the day, this computer communication was beyond amazing!

@tnmz6i 2 года назад

My first vehicle was an ‘88 S-10 Tahoe with the 2.8 V6 my brother sold to us for cheap. It was a fantastic truck. Got passed around to several family members and had almost 300,000 miles by the time we parted with it. I miss that truck dearly and would buy another first Gen S-10 in a heartbeat if I find a clean one. Oh yeah, I also flipped the air cleaner lid back in the day!

@gregscott9170 2 года назад

Living right on that one! Got the OG O2 sensor out AND found a PCM locally. Impressive. 👍 I really wanted to hear it run after the fix with the air cleaner lid flipped. 😆

@lordaca807 2 года назад

Man, this brings back lots of old memories. I think you should start working on antiques like these more often. I would also be curious to know the cost on how much the owner spent fixing the original parts vs switching to a Holley efi system.

@based_will 6 месяцев назад

There’s none left that aren’t rotting in a field. Few and far between even in states like CA. Not cool enough to save and restore like classic muscle but old enough to have all been driven into the ground and scrapped

@BustedGeezerGarage 2 года назад

I just finished working on a 1986 Corvette. Some of the same problems displayed that you found. The ECM's go bad due to bad internal grounds in the ECM. The other thing I have found on these model years is bad grounds. They test ok with a voltage drop but still have problems. GM is well known for crap grounds. They used to ground the ECM to the bolts in the thermostat housing. I have fixed tons of these with just taking apart the ground connections and cleaning them up. Great video man.

@tiredagain6722 2 года назад

Got a good laugh over the "dash lights" 🤣

@billmalec 2 года назад

Upside down air cleaner lid, the 'cold air intake' of it's day... 🤦 Both of them equally effective...

@FishFind3000 2 года назад

Yep, getting all the hot air

@clydebrooks9961 Год назад

This channel is the best. From relating the king pin bushing to the fout post lift bushings to the 88 S10 Issues.

@donaldreid1847 21 день назад

I put a Howell Conversion Kit in an '87 4.2 Wrangler. The kit is a late 80's early 90's GM throttle body system. It runs well by comparison to the AMC carburetor and crazy emissions system. It's also CARB compliant, love NY. Lastly I never thought I'd see the day I actually installed a CEL in a vehicle that didn't come with one. I'm 73 and I learn something everytime, I previously thought the various sensor outputs would simply go thru the ECM to the scan tool. I wouldn't have know to check voltage at the connector and compare to scan tool reading. Time to finish putting a new front spring in my '29 Model A pickup. Thank you

@DrFiero 2 года назад

For the newbies out there… for the ECM replacement, you want to match the “service number” like 1226069. That’s the ecm itself model or part number. Then the prom chip inside should follow the vehicle. It has specs like which engine, trans, tire size, fuel and timing maps - list goes on. So you could swap them around and it might run, but it might not be right! Speedo could be out, engine might run funny. Or you could have an auto trans where all of a sudden you have an upshift light come on! That’s always fun. :)

@fredwalker839 2 года назад

Not too many “ newbies” today get to have the fun of removing that caterpillar prom without bending ! How many pcm’s are replaced today compared to the late 80’s into late 90’s.. Next to NIL ! LOL

@Discretesignals 2 года назад

Maybe would be a good idea, if your the customer, to put it on a prom reader and copy the data, so if the prom ever died, you'd have a back up.

@2dfx 2 года назад

Yeah as long as the ECM is the same part number, just need to switch the MEMCAL and you're good.

@crazyedo9979 2 года назад

@@Discretesignals No backup, no mercy.😁

@Blazer02LS 2 года назад

Must be a "vintage" tech like myself. I remember all the fun with those years. Custom PROMs that eliminated limiters or changed tire sizes or gear ratios, think I still have the software someplace.

@relentless6156 2 года назад

"just tickle this thing with a torch" I cracked up laughing off of that one 😂

@danielgeng2306 Год назад

Glad to see this rig still on the road! great trucks, my sister had an 88 blazer with a 4.3, great power and great in the snow. Sadly it succumbed to the cancer of the northeast… rust.

@wadet73 Год назад

I had a 1991 GMC Sonoma ST 2.8 5 speed. Smooth, fairly quick, sipped gas. "Smells like mouse piss and cinnamon" I'll have to remember that one!

@TheOmegaman69 2 года назад

This was a great diagnostic video. The three (3) things that were most likely to cause the symptoms the vehicle was showing, alternator producing high voltage, a floating ground (causing a higher voltage on the ECM, like the alternator might), or a bad ECM. And, you checked/tested those pretty much in that order. This diagnostics is an almost perfect diagnostics. One that all should strive for. Great job. The only thing that prevented it from being a perfect diagnostics, was that, well --- We did not get to eat any of your wives home cooking. Great choreography as well. Thank you for making these videos. I know they take more work and considerably more of your time to do. They are greatly appreciated. Omegaman69

@daveburkart2363 2 года назад

Whhhhiiiizzzeerrrdddd???...is that you??

@johndoughenbro7719 2 года назад

yeah i said that also, sounds suspiciously familiar, like the disguise isnt fooling any1, type of feels

@richardr2238 2 года назад

Hi Eric, when you shot the underside, and said SHE"S MINT, and yeah "she"s pretty clean", I laughed till I cried ! You and Wes are the best repair guys on youtube , thanks for these long vids by the way !

@steelwheels327 Год назад

Your diagnostic skills are amazing Eric!

@Fattony6666 2 года назад

nice to see a 88 still on the road! Hopefully I'm wrong but I think we won't ever see that kind of longevity again with all the software and everything being over-engineered to fail. Plus all the plastics in the engine bay.

@ihavethedocuments2580 10 месяцев назад

The best thing a person can do is familiarize themselves with their own vehicles, if they are so mechanically inclined, and be able to diagnose themselves if they want to have a vehicle that long. Rust aside, if you live in a dry climate one could make their vehicle last for a very long time. I would imagine many a vehicles being junked for a problem like this that can be easily solved. These guys on ytube are fun to watch, and Eric is one of the best at what he does. Mechanics like him out do dealership techs all the time Lots to consider with these new models

@wjdunk 2 года назад

All the ingredients of a great SMA video, Mrs O, kickass lunch, an off camera trip to junkyard, blow torch action and off course a happy outcome. Well-done Eric.

@garymallard4699 2 года назад

you forgot the Cat and Fly...

@paulcochran1721 2 года назад

Just missing the noon siren and a spray of Brakleen!

@jw6825 2 года назад

CHEVY THUNDER!

@burtbacarach5034 2 года назад

I've lost count of how many first and second gen S10/S15's I've owned.But they're rare a hens teeth as they say now.Good to see one still on the road after all these years!You and Mrs O are something else,Y'all could have a sitcom of your very own.

@dlsimmonsjr1 2 года назад

This was so cool!!! Thanks for bringing me along. I enjoyed the ride. God has you covered nice job Mr. O

@mikechiodetti4482 2 года назад

I like that test with the "sniffer" to check for evap core leaks. The test tool has lights for leak checks which is great, and the oil injection tool looks like a big help.

@guymanicone7921 2 года назад

I haven't started watching yet but this is what I've been asking for. I have an 89 GMC S-15 with the 2.5L that I like to tinker on. So I'm kind of a geek about these trucks.

@Abandoned_Brane 2 года назад

Sell me the ride....

@crownline5555 2 года назад

Eric, I ABSOLUTEL love your videos. I wish I could find a super skilled mechanic like you iny little town here in Oklahoma. I LOVE how you ANALYZE problems and never load a parts cannon until you have verified the faulty component. I am kinda an old school mechanic and have learned so much about using scan tools to find issue by diligently watching your channel. Keep up the excellent videos and I will keep on watching. THANKS ERIC (and thanks to Mrs. O for always taking good care of you. Her lunches look awesome.. FreddyB Claremore oklahoma, (no rust belt)

@johncraig406 Год назад

Oologah, Oklahoma is not any better.... Countryside Diesel Repair just NW of us, is a super good shop, they will put it back to OEM condition, and they work on everything.... Fixed my 5.3L Vortec Suburban a few years ago, compressor shelled out, and they found the O2 harness eaten up by sharp teeth.... PVC valve was bad, intake manifold gasket was mostly gone... it now runs like brand spanking new

@allenwelsch2839 Год назад

I love it when you do the test drives. I'm reminds of my time in Central NY driving around the countryside.

@TurboJThomas Год назад

What an awesome journey! Props to you for not just firing the parts cannon!

@andybonneau9209 2 года назад

Very common to have a bad PCM or connection with the PROM and it's socket on this vintage GM. I used to give them a tap test.

@terryharvey4811 2 года назад

I was waiting on someone to mention the rubber hammer test. Had a late 80's GM that I could turn the AC on and off with a rap of the rubber hammer to the ECM.

@RichardHeadGaming 2 года назад

The old tap test worked a treat.

@gary00832 2 года назад

Watching Mr .O has given me confidence to diag more complicated problems on my vehicles… only problem now is tool availability, i could do more if I had more!!! Thank you Mr.O sir!!!

@5dumars 2 года назад

Wow this truck brings back so many memories. We had a 1983 S-10. Just seeing that steering wheel made me smile.

@paulhoskins7852 2 года назад

Gotta love some Eric O, always a quality repair show!

@redluck01 2 года назад

Do you remember back in the day when you hooked up a volt meter to a car and counted the meter sweeps to get the codes?

@mikeam3871 2 года назад

Remember Shorting the connector pins on the diagnostic plug and observing the check engine light doing Morse code?

@richardcranium5839 2 года назад

@@mikeam3871 yep gm. fords used the meter sweep. chrysler had a led handheld scanner

@jerrypeal653 2 года назад

Extracting that o2 sounds a lot like me getting out of bed in the morning these days

@BuggysTowJam 2 года назад

My nephew just bought a $3800 yoder smoker that he's wanted since he was 14 he's 22 now. We went over his house for a bbq and he had brisket, lamb, ribs, beef bone marrow, chicken it was delicious he started cooking in the morning and 8 hours later it was in our belly's. He gave me tips on smoking the meat. And how he goes about obtaining prime choice meats which I'll keep to myself, don't want to get the lil fella into trouble.

@RoadRunnerMeep 9 месяцев назад

Watching the car videos is enough, but combined with Mrs O when she has the cooking in, that's heaven right there. Great diagnostic work, I always enjoy your videos, they're easy to follow and awesome to learn from

@MDAdams72668 2 года назад

I have worked on many of these (in the LLV ) for the post office(tho they had the iron duke.) The later ones with distributor less ignition have constant ignition module, and pickup failures ALL of them have pin fitment issues and the early ones have prom fitment issues BUT these trucks have 30-37 years of hard use and are still out delivering your mail every day

@fredwalker839 2 года назад

Still see em!

@colestowing8695 2 года назад

I thought all those old llv's were scheduled to be replaced a couple years ago? Was i wrong? Did something change? (maybe the unspecified virus of unknown imported origin messed with schedules?)

@qapncrunch 2 года назад

@@colestowing8695 Yeah, they're finally being replaced. Still probably going to be 5-6 years before they actually start taking LLVs off the streets, think they are going to return the leased Mercedes Metris minivans first

@willw8011 2 года назад

Once, I tried to get a job with the Post Office working on their mail trucks. I think the hands on test on an old mail truck is what busted me out of the job opportunity. I was surprised that the running gear for those things were 1980s S-10 dinosaurs. The guy administering the test wanted me to look up all of the torque values and do everything according to the S-10 Haynes automotive manual. At the time, I was working fleet maintenance on newer pick-up trucks and medium duty trucks. I remember looking at the shop manager and saying: this thing has a old distributor, like who uses these things nowadays?! Looking things up in an old paper back manual also threw me for a loop.

@amycyclenut 2 года назад

So awesome to see you working on vintage! Fun change a pace as a viewer.

@franksprecisionguesswork501 2 года назад

I had a 87 Chevy G-30 van, 4x4 pathfinder conversion. Same vintage TB injection. It started acting all crazy above 30 mph or so. Bucking and spitting, popping, pinging etc. after changing the usual suspects I noticed the engine temp sensor had a white lump growing out of the brass body. (I guess that’s the California version of “the green crusties” . I changed the sensor and the nightmare turned back into a dream!. Sad to say I sold it after 35 years and 265,000 miles…..(I’m crying inside right now). Great seeing you keep the oldies on the road.

@charlestredway8253 8 месяцев назад

It’s great to see you work on and resolve issues of decades old vehicles. Thanks for posting that video.

@focusedelectronics 2 года назад

Loving the longer videos and frequency lately! Thanks for all you do to keep us entertained.

@mdorf61 2 года назад

Dude, you have gotten so much better at doing videos, compared the "Dr. O" days. :-) But your videos are always very informative. Thank you for all you do. Great Channel.

@mrkeopele Год назад

that is a skillfull spouse! Congratulations on what looks like good coupling!

@markmoffitt7309 7 месяцев назад

For those of us that don't look at diag screens everyday, this was an awesome video. The basics of getting the O2 sensor to work and then watch the PCM toggle between rich/lean to get the correct mixture was refreshing to watch with the vastly simplified data display. I know you were stepping back into the "bad old days" but I really enjoyed the simplicity!

@hikerJohn 2 года назад

Instead of putting it in the freezer you could spray it with caned air (computer duster) that's a lot colder than your freezer. Just an option if you want to speed things up.

@sometimesleela5947 2 года назад

Also useful for debugging the pc board itself. Flip the can upside down and dribble the liquid on individual components until it starts working again.

@hikerJohn 2 года назад

@@keithdodds8969 Might be worth opening it up and looking at it or mail it Ivan. Bulging capacitors are pretty easy to see.

@hikerJohn 2 года назад

@@keithdodds8969 I guess in this case it was cheaper but he said he got lucky that he was even able to find one. I would at least try just to see. At least LOOK at it. It might have been just a solder joint.

@sometimesleela5947 2 года назад

@keith agreed. the freeze spray is only for thermal intermittents, which is almost always joints & traces that go bad with thermal cycling. bad caps don't start working again like this, and bad ic's are usu. either good or bad from the factory and stay that way.

@Martin_from_SC 2 года назад

definitely a cool diagnostic on an old rig. not many of those around nowadays, i havent seen a blazer/jimmy of that vintage here in Toronto for years. all rusted out and/or scrapped due to drive test emissions.

@fredwalker839 2 года назад

For sure,,,& you have to have seen the favourite! A 350 swap that went global ! LOL

@kennethandrysiak4130 6 месяцев назад

Eric, you are a vehicle scientist! Love the videos and your impressive, intelligent approach to any and all problems that are presented to you.

@jimwhite1061 2 года назад

Got to compliment you on your resolve mr O, there is a reason so many of those went to the crusher. As I watched you work on that I passed out twice and had one sezure. Horrible memories I thought I had buried. Thanks

@chrisoconnor7110 2 года назад

Own 2 S-10s, a '93 350 swapped daily and a '91 4.3L, but worked on several 2.8Ls, never had the pleasure of dealing with old candle stick O2 sensor but yeah fire is a MUST for removal, have several PCMs due to internal gremlin issues, hard to kill these trucks, looking at an '88 manual right now, Great Work Mr. O! Love your channel!

@rodkubis384 2 года назад

One thing I've always done is use a cutoff wheel and cut the O2 sensor off at hex nut. Then you can get a 6 point socket / impact driver etc. in there to remove it.

@thomasszilagyi7445 2 года назад

I cut the wire(s) and use a (very) deep socket 22mm.

@GNX157 2 года назад

I kept wondering why he didn’t slip a closed end wrench over the wire and use that instead of the open end.

@richardhall9815 2 года назад

It's amazing how much older Eric O. looks without his hat on!

@robertklein9190 2 года назад

Those anti-foulers got.many cars to pass inspections in the day and replaced the spiders in the old S-10's too many times to count. Love that"Pick and Pull" saves again.

@fanatic26 2 года назад

GM around this timeframe was using a spray coating on the circuit boards to prevent corrosion that would actually shrink with heat cycles and over time pull on components and create lots of intermittent issues like this. I owned a couple Geo Storms from the same era with the same kinds of PCM problems. Just throwing that out there as another root cause possibility

@fanatic26 Год назад

@working_country ___ No its not. It was built by isuzu and used GM parts. The tracker and metro were suzuki

@wolfeadventures Год назад

So reflowing all the solder on the board may be a solution if the pcm are not available?

@kurtutube1 Год назад

Storm was an Isuzu Impulse.

@terrenceolivido741 Год назад

yeah i was gonna say taiwan - even back than - could produce 100% reliable parts like the pcm. so, it is sad that G.M. still wanted to " get away " with something. took a long time for chrysler and G.M. to go bankrupt. In the end it was handshake deal under-the-table with the government to re-negotiate their pension obligations. in the 1960's we said " as G.M. goes, so goes the country. "

@YamahaC7SRG Год назад

Thanks! Excellent work! I didn't realize that scan tool would provide so much data from a 1988 vehicle. Also, I wouldn't have thought you could swap the chips like that. Gives me something new to consider as I try to keep my fleet of antique steel running!

@RB-qq1ky Год назад

Yep, shed a tear for us Ford Techs. No serial data access like the GM guys got pre-1990 until EEC-5 which was 1998-99 in the market I worked in. Even then the PIDs were full of anomalies like HEGO voltages in the 2v range, ECT in degF vs CHT in degC, things like that to keep you on your toes😊

@rnrudynh1427 9 месяцев назад

That was the cool guy terminology back then...ohh yeah duel exhaust, lift kit Micky Thompson's. But Is it chipped..? Ohhh man those were the days. I mis carburetors

@DonPepo006 Год назад

I had an 86 S10 "Tahoe" Blazer 4x4 !! Ahhh brought back memories. Thanks again for the great videos!

@dustingreen6210 Год назад

Bring back memory, had one in mint condition and let her go for $500. Just a dumb kid back then, great video!!!!!

@kens97sto171 2 года назад

These were great basic trucks... the V6's were decent power, and pretty reliable. and easy to work on. It's kind of amazing to me that it ran at all.. with that much corrupted or missing data/ feedback.. sometimes simple is better. Makes me want to go find one of these.. be a great basic practical truck.

@Dustin_the_wind 9 дней назад

Nice shout out at the end. All we are is dust in the wind. Thanks for the lesson Mr. O.

@JorgeFernandez-uc9qb Год назад

Thanks for the thorough diag. You were clear and concise. You have helped me tremendously. Have a nice day. That brisket made me hungry.

@AntonioClaudioMichael 2 года назад

I would say Vacuum leak but that O2 sensor does seem Dead as a Door Nail and it hasn't gone in to closed loop yet good video Eric O this brings back lots of good old memories don't make them like this no more @SouthMainAutoRepairLLC

@akshonclip 2 года назад

Those old ECU’s capacitors start leaking over time. Even a working used ECU will suffer the same fate sooner than later. Recapping them before damage to the circuit board is a good idea if you plan on keeping a car that old.

@sadeemsadeem9301 Год назад

Good info..and by which Matterial we can recap that Capacitors

@JamesSmith-xs7sr Год назад

True, spent $1.5k having 2 Carver 1.5 amps "rebuilt", suffered the same issue.

@608Iceman 10 месяцев назад

Great video 90 GMC Safari van for 3 l solo problems and give me a direction hopping up all set to strange issues is an idea on how to track the problem thanks Eric

@608Iceman 10 месяцев назад

Great video 90 GMC Safari van for 3 l solo problems and give me a direction hopping up all set to strange issues is an idea on how to track the problem thanks Eric

@burntartic2239 10 месяцев назад

OG poster meant just replacing the electrolytic capacitors. Not actually, "recapping" the old worn out ones.

@badbanano 2 года назад

What’s interesting about the old chips is the shortcuts engineers built into them. I could set a caddy for stage two temporarily with the heater controls. There was a weird thing with jumping a resistor across the pins to set base timing also.

@64maxpower Год назад

I'm amazed with you every time I watch your videos

@1607rosie 2 года назад

Love the diagnosis. Your methodical approach is awesome. With the data bouncing around I'd think it a electrical issue. I agree pcm would be my bet.

@fredwalker839 2 года назад

Replaced many in those days….. hardly any now !

@darren_clark Год назад

Came for a Jeep Patriot CV replacement 5ish years ago. Staying for the brisket. ;) Love the videos, thanks for pumping them out.

@tmsracing8202 Год назад

Man does this bring back memories. In 1986 I was living in Mass & I bought/ordered a new 1986 2wd S-10 Blazer with 2.8l V6 with 5 speed manual. It had the exact same hi idle issue - but mine idles at 1200+ some times 1500+. Did this from new. Sometimes if you red lined 1st gear smacked 2nd gear & then red lined it & then put in neutral it would be at 3000RPM and stayed there for a bit. man was I glad it was a manual could you image with an automatic it would have took off on you. I took it to 2 different Chevy dealers - but they could never duplicate that 3000 rpm issue. Nor did the fix the normal 1200+ idle. Mass had yearly inspection were I would get rubber stamped to pass. failure due to hi idle. Now had I bought it & lived in Ohio - GM would have had to buy the truck back on lemon law. So over the years trying to fix it, I replaced every sensor on the engine with no luck - I did new engine in 1996. Distributor, Holley TBI over the years. nothing fixed the issue - as it got older the idle increase to the point it was permanently above 1500 closer to 1800. Buy tweaking the TPS volts to low side I was able to get the idle back below 1500. I owned another 1986 GMC S-15 Jimmy V6 & 5 speed manual up to mid 1993 & it idle at 800 like it was supposed to. Only diff was it was 4wd. which the ECU does not control But I never swapped the ECU between them. I should have but didn't. Looking in the ECU data it said that AC was on. Um I didn't have AC, should that be off. So I think the truck was sensing AC was on so it increase the idle speed to compensate, which I believe was the 1200+ rpm idle I was seeing. So I still own this 400,000 miles later - same issue. But in the last 10 years I did find a 1986 S-10 V6 manual in a pull & pay, I got that ECU & still had the same issue. Check the data - yep AC was set on. Never did figure out the 3000 rpm after reline shifts though.

@brianmeek5236 2 года назад

The 440 squad cars had a spark control computer on the air cleaner, our local dodge dealer moved them in the car under the dashboard so they could enjoy the A/C and they ran flawlessly

@fredwalker839 2 года назад

10-4 Rubber Ducky!

@drewscruis 2 года назад

I'm finding more failed capacitors in these ecm's that's probably what happens with the old one. They fail then leak and can cause all kinds of intermittent issues.

@rickkcir9959 2 года назад

Caps are like rubber parts, they dry up and need servicing. Replacing capacitors has saved sooooooo many things in my house. Two wide screen TVs, 3 computer monitors, a very nice desktop motherboard, graphics card, UPS, printers, .... It's a bad cap 70% of the time. Just look for bulges and/or shit stains. A cheap ebay ESR tester is pretty handy to have on hand.

@knurlgnar24 2 года назад

Highly unlikely to be a capacitor issue. These units are solidly designed and use ceramic caps almost exclusively. It is almost certainly a solder joint failure which is difficult to find and diagnose.

@jw6825 2 года назад

@@rickkcir9959 Going that extra step and opening up the case, you are likely correct. This is 1988! There will absolutely be 3 or 4 electrolytic caps in there, and an ESR meter would tell you good/bad in all of 10 seconds. No need to apply power to the circuit board.

@CubasAutomotive 2 года назад

@@commietube_censorship_sucks wrong. I opened a few of my S10 ecms when someone else claimed the same. I opened up 3 after I posted my comment that these only have the ceramic type. This vintage from 85 to 94 only have ceramic disc caps, no electrolytic types.

@floorpizza8074 2 года назад

@@knurlgnar24 Completely agree. If it was a bad cap, it would be bad all the time, not just when it's hot. But you know what *does* rear its ugly head when it gets hot? Bad solder joints.

@dporrasxtremeLS3 2 года назад

Loved the Food Show and how you build anticipation! Grea video! Thanks Eric O.

@chrismunos7741 2 года назад

Had that exact problem. Bought all the sensors that I could from a boneyard truck including the ECM. Changed them all and lastly the ECM. Bam! Nailed it. Mine was a '93 Chevy 1500 with a 350. Love your work!

@jackbilger6858 2 года назад

The smaller chip is the "calpak" -- basically a matrix of resistors to let the vehicle run in limp home mode when the main EPROM fails.

@russellstephan6844 2 года назад

Bringin' the heat! I have a 1970's Schwinn (bicycle) which I've mostly updated to modern components. However, the one-piece crank was still OEM. To get modern clip-in pedals to function with the old crank, special adapter pieces were needed. I installed the adapters a few years ago and the bike has seen a half dozen thousand miles of use since. Well, this season, I decided to replace the OEM one-piece crank with a sealed bearing 3-piece... I wanted to save those clip-in pedals, however, which required the removal of the adapters. The problem? The adapters will spin on for installation. But, there's no way to grip the part for removal. I had to disassemble the pedal down to its shaft, mount the thing (bearing surface) in a small set of V-block vise jaws, and apply heat... Without the heat, I would have had to crush the pedal shaft (bearing surface) in the vise so much, it would have damaged the machined rolling surface. Looking back, I wonder how I ever got anything done without a smoke wrench in the shop!

@russellstephan6844 2 года назад

Oh, and speaking of, "Bringin' the heat," I was scanning Facebook Marketplace while listening to Eric. Someone has a pair of "Settling" tanks for sale. "Settlin'" is country-speak is for "acetylene." Made me giggle, it did!

@Friend_of_the_One-Eyed_Ladies Год назад

Glad you got em out. Another trick is padding your vise jaws with something. Leather, shop towels, etc.

@volsguynga 11 месяцев назад

Good old trucks. Great video and nice to see Mrs.O. Hope you both keep up the good work.

@TheFruitingChamber 9 месяцев назад

I love how happy you and your wife are makes me smile every video :p

@paulcochran1721 2 года назад

Miss my S-10s - I've had seven over the years. "Tahoe" was just a trim level at first until the full size rigs replaced the Blazer name with it.

@JohnSmith-xx9se 2 года назад

My first car was an 85 s10 with the big 2.8. Was a POS 20ish years ago. Can't believe this thing is still on the road.

@trevorjarvis3050 2 года назад

My current daily driver, grocery getter, dog hauler is a 96 S10 Blazer. It’s got the big 4.3, no rust anywhere, 110k, and mine too has a fragrance, … wet dog! It was free and I love it!

@mikemurray6727 2 года назад

I bought a 84 S-10 with 2.8 new. Serviced every 2500 miles and the engine was junk at 70,000 miles

@forindooruseonly646 2 года назад

The 2.8 was one of the worst motors ever built.. just a complete dog.

@CubasAutomotive 2 года назад

@@forindooruseonly646 i disagree. I pretty much beat the average vehicle off the line here. I've an 86 2.8 with TBI. No work done. Automatic. Still OG engine with just over 200k miles, my DD. Now the manual version, they're dogs but that's a trans issue, not engine.

@fredwalker839 2 года назад

@@forindooruseonly646 Bang Bang,,,,your died !