Rough running, low power P0102 P0340: '97 Chevy S10 

Dude I have been a mechanic well over 35 years and every time I watch your videos I always learn something tank you my brother

Definitely one of the smartest dudes on RU-vid awesome video thanks!

Cool. A mechanic that understands basic electronics. Much needed these days.

A sure sign of the Apocalypse......an honest mechanic that knows what he's doing!!!!

Ivan I want to thank you for saving me over $1200. I watched your vid on airbag passengers seat sensor, and it was the exact problem I had with my Kia Sodona. The stealer wanted $1350 for a new seat, and I got in contact with the sensor company you used and fixed it for$60.00! I can't thank you enough. Love your channel, as well as Eric's. Keep doing what your doing. You'll be a great success.

If the truck runs crappy when cold, and gets better as the engine warms up, you may have intake gasket issues. Especially with the long term fuel trim numbers improving when revving the engine It is very common on the 4.3/5.0/5.7 engines from this era. GM's intake manifold gaskets are thin, and cheap. I have already replaced them on my 2001 S-10 4.3L with a set of Fel-Pro gaskets. Thanks GM for using crappy materials!!!! Good video though. Thanks for taking the time to film the procedure.

Awesome video saved me from having to take my truck in and have it diagnosed thank you.

Listen your worth every penny wish I had a mechanic like you. Very thorough

What Victor said.......you really know your stuff young man....way to go.....

Always sweet to have a happy customer, he for sure will tell his friends.

Damn! We need more mechanics like you in this planet. All these mechanics out there are just ripping people off. They would of told me it was my fuel pump or something major like that to charge me an arm and a leg. I dont mind paying as longest they do it right the first time.

I'm starting to see how handy bulbs are for doing diagnostics. Great work.

Thanks for taking the time to film this and explain it. My safari van is doing the same thing right after I replaced the exhaust doughnuts and I’m thinking perhaps I damaged or shorted an o2 sensor. Anyway very helpful. Thanks and please keep posting.

Oh, never mind, I see later on you do exactly the right thing! With the test lights. And you come to the experienced conclusion that the fuse blew due to a short, not just from age. Good job!

You are a great mechanic and awesome electronic man , thanks for taking your time explaining and Sharing your videos.

I learn so much you are by far the best mechanic .. out there by far. Your structure is top notch .. thanks man. All the way from Mexico.

Very quick and tidy fix Ivan. Well done. Thanks!

Ohhh an S10 vid. Best vehicle ever made!!!

I like the way you do the update at the end of your videos. Great job Ivan looks like you have a few things going on seen the trailblazer gate open

I just learned the bulbs into the circuit yesterday. Cool to see it being implemented... kind of haha

Hey good video Ivan those erra gm trucks including the full size, the wiring harnes runs along the cross member for the transmission going to the down stream o2 sensors . The harness will come loose and rub the front drive shaft when in 4wd only .the front shaft won't turn in 2wd have him put the truck in 4wd and see if it blows the fuse wile driving if it does suspect the harness rubbing

I've also noticed on GM products that the first crank after a clear code or battery disconnect is extended. I assume it's just because the PCM loses its adaptive data like IAC position, fuel trims, etc. When it first happened to me, I was a little concerned too.

In 1997 my girlfriend bought a brand spanking new gold s10 extended cab pickup with the 4.3 engine, there were three to choose from, a red a green and a gold. I did all routine maintenance on it after the warranty was up she insisted on letting the dealer do oil changes etc. The only major thing to go wrong with it of course after the warranty expired was the valve body, it was shifting rough with delayed shifting, she took it to the dealer they replaced it for 1,200 and it's been good ever since, two years ago I rebuilt the front suspension two new lower control arms one had rusted to the point where the shock mounts was completely rusted away so the shock wasn't attached, after all the work it was like a new truck, she has 148,000 now never had any wiring issues, it has manual windows, she bought a nice high cap for it the following year. The first time I did a full tune up I made the mistake of using a non Delco ignition cap and rotor, I got what I thought was the best advance auto had to offer, then the problems started, it wouldn't start when it rained, it was losing power I tried another cap and rotor this time from AutoZone and still it was no good, then I did some research and found somebody who had the same identical problem so he bought a Delco cap and rotor and his problem was solved, I thought it couldn't be that simple but I had nothing to lose, that was some five years ago and since installing genuine GM parts I never had another problem, the truck starts up with a flick of the key no matter how long it's been sitting except in the winter when it's extremely cold and the oil is thick, she's never been abused the interior is like new.

Wish I had a mechanic like you...

Just purchased a 2000 blazer and this is what was wrong with my truck. Thanks for this video i was able to fix it. Yes it was this fuse but on 2000 blazer the Engn 1 fuse is under the hood and a 10amp.

MAN THIS VIDEO HELP ME SO MUCH WOW THANK YOU

One has to love the fix made easy with complicated equipment. :) I'm going to spend a day with Keith in little over a week. Got any tips? Eric said bring lots of coffee. (ha ha)

on my 96 Sonoma there are some wires right below the steering shaft that were rubbing on the exhaust pipe and it was hard to tell until I looks through the wheel well , it's a 2.2 liter . this truck may be different .

Obviously you've been thru an education program and managed to stay alert and continue to remain so. 👍

I've found fuses that have blown due to age as well,my parents hot water system fuse blew at over 40 years of age in the meter box on their house & there was no fault in the hot water system or its associated circuit,I replaced the fuse wire for them with 15 amp wire. To be honest ,whoever wired the house up seemed to use 8 amp fuse wire which is for the lighting circuit in 1977 but it decided to blow this year !

Nice job Ivan 👍

9:03 you might have just saved my Bacon. Thank you for the expertise.

wish I was there, I made it you can't beat it thanks Ivan sam

Impeccable knowledge......

I have had many of those in the past,that 1 of the 02 sensors,mainly behind the cat is intermittently shorted causing mass air fuse to blow,by simply tapping on the 1 of the 02 sensors, throwing p340 codes as well,especially the R motor 5.7 liters V8,Just saying.

I wonder if it will set a cam crank correlation code. 15 degrees is a lot. Worn dist gear. Great video. Interesting that u said half the current is from bulb filaments.

Nothing but the best from pine hollow diagnostic

Always nice to get the simple blown fuses. But also can bother ya in back of your mind when you ship it always wondering if its going to come back. Had a issue like that on a Volvo S60 for the wipers.... Vehicles hasn't came back yet so i'm taking it was just a blown fuse also. Side Note: I got stuck in the storm Friday after work on the bike...... Boy was that fun, had to ride through what seemed like a lake by wal-mart! Whole front tire was submerged lol!

Great video Ivan. Thanks.

Wow. Love the diagnostic tool/tablet. Female here that knows some stuff can be so simple. What state are you in. You are good at your job. I'd bring my old cars to you in a heartbeat.

BBB industry is no longer wiring diagram available ..is other place you like this in the web ??? Thanks for all you do .

Whoa !! You lost me about at the start of this video . That code reader takes a college electrical engineering degree . I quit ! Smart man that can do this .

When i grow up i wanna be like you. LOL

Thank you sir. first video i watched and boom it fixed my truck. i thought i was good. you are good. thank you again sub for sure.

Surprises me the truck even starts! The minimum fuel pressure at idle is 50 psi. One here with 48 psi wouldn't even fire off. Replaced pump and filter then spider injection system due to misfires. Note that some of these pumps ground through frame, but if factory security it may ground through pcm. Ours grounded through frame near pump, cleaned that up when we replaced the fuel pump. Never had any ign fuse blow, but I have seen other GM no starts with EMC fuse B blown which is fuel pump circuit related. Verify the accuracy of your fuel pressure gauge.

WHERE ARE YOU LOCATED? MY 97 HESITATE ON TAKE OFF THEN CLEARS UP WHEN WARM, I CHANGED EVERYTHING.... THANKS FOR THE VIDEO

gracias my amigo to share the video

I like your style. What is that 1 hour rate going for. Live near you and would love to have you as my mechanic. Ivan too.

What scanner do you recommend for a first time scanner user? Not a total newbie, but what's the more user friendly scanner and what's the more comprehensive diagnosis scanner? Autel looks like the more prominent brand now, but I really don't know. Is there a scanner that "just works for every car", or not really?

don't you just love coming home from vacation and being covered up with work!

My wife fusses at me for working with my shirt off. At 66 I guess there are things growing on your skin that might be triggering for those with weak stomachs!

Dude you know your shit I need someone like you. My truck is weak asf

Can you come to jonesville NC?Three fuel pumps in three months.Mechenic said leaking back in the tank.No,not in injectors or pressure regulator.

outstanding sir

Sometimes a blown fuse is just a blown fuse.

Hi, I know the video is old but very nice, I have the same symptoms but my fuse is not blown, what do you think, please let me know. Thank you very much

Another fine one from Phd.

Great fix... I dumped my 97. The intake was giving the same symptoms. Crap design. Tank of a motor.

Mine does the opposite.. Have an 02' Blazer Zr2 with 4.3.. Stopped at store it was running great, then came out & had a no start condition. Towed it to a shop & they said the Coil shorted out the ICM & it needed a new Distributor. Cost $700, now it starts fine, has a little power when Cold but as soon as I hit Operation Temp? It bogs down bad, no power at all. It's like no fuel or spark. I replaced the plugs, wires & Temp Sensor. Still didn't help, made it worse actually. How could it go from running great, to a no start condition, to now all these problems or am I fishing? You can twist the new distributor right & left a little, it's just like a clunk clunk type turn but does nothing to the engine. Confused! No codes besides a miss, no check engine light also.

Good job Ivan

methinks there's a wire chaffed/shorting down yonder ;) been a while since I was graced with an S10 repair

Nice video as always Ivan, thank you. As an aside I see that you often use a headlight torch. I am looking for a good robust LED rechargeable headlight and would be very interested in your experience and product recommendations?

ohh a s10 with 4.3 pee 6, wheel burning fun :)

Sometimes a $xxxx dollar scope is not the best tool. For instance on a +12 volt feed you very rarely if ever care if there is +12 volts with no load, or the scope 10 megohm input load, you want to know what you get with a tangible load, say 100 milliamps, like what a hot-wire sensor might draw. If a connector has just a smidgen of green-copper corrosion it will show 12 volts with a scope load but near zero with a real load. A 12-volt taillight on the circuit is more informative than a $xxxx dollar scope.

Seen the o2 heaters causing this many times along with the harness rubbing the driveshaft

Do these vortec 4.3 engines have a crankcase vacuum ? ...example : I have one and once the oil fill cap is removed , I can feel a good amount of suction thru the valve cover oil fill tube Thanks for your tips 😇

I knew as soon as you removed your shirt you would find the problem Ivan. lol

I have a funny feeling that there's part 2 on it's way, maybe not tomorrow but on the horizon.

seen that the truck had some evap codes as well did the fuse change take care of those ? have the bad P0420 code on my 97 have changed the cat both oxygen sensors and the vent valve switch gas cap and it still comes back

Great job, had to subscribe.

For the first time I'm watching a video have a person that knows what the hell they're talking about even though he losta little bit I wish this dude was around so he can fix my truck and tell me what the hell is wrong I've had numerous mechanics not know what the hell and keep buying parts

I had a code po340 it turned out to be a corroded crank sensor connector.

I have a 2001 chevy blazer that has had the front Cat removed and the rear cat gutted? I have done everything to try to get it to run good put $$$ into it spider injectors, tune up, Maf sensor water pump,new distributor etc... I also have 02 sensors(have not installed yet) i bought since my code reader said bank one was bad . It still runs very rough I just want to get it running good sell... Any suggestions? Thanks for your time..

Ivan how much do you get a hour labor

Did he leave the driver's window open in the rain? Green crusty's in the fuse box.

You rock man :)

Hmmmm. Interesting Ivan ..

Seem like you know your stuff and i need some help on an 03 zr2 s10 4.3 5spd truck runs good on level ground but when you put it under a load like up hill it falls on its face and if u down shift and run it hard it is sluggish and you finally gt it to 3500 4000 rpm range the ses light will begin to flash and it will dead miss but when you level out or turn down hill light quits and miss goes away and no codes stored at the end of my rope threw a bunch of parts still no change any info would be much appreciated like your videos

Surely if it blew a 20 amp fuse it should have been replaced with a 30 amp. If not a paper clip to make sure it doesn't blow again ;)

I’ve done changed everything on my s10 still bogs lightly I’m going tot Ty this tomorrow

Good stuff; led me to my own blown fuse

Be mindful of glare viewers can’t see but good job .

Great video. Hey wanted to ask you do you still have your Autel and launch scan tool's? haven't seen them in a while.

another great video, shirt or no shirt LOL

good deal ivan.

I wonder if the neighbor knows how lucky he is living next to Ivan Temnykh. Or is it I think my neighbor is a mechanic or something, maybe I'll see if he can fix my truck.

I pulled my distributor and forgot to mark it.. I think I timed it right… it starts up and idles with a little knock that sounds like lifters… I got the p0340 code 1998 4.3 s10 someone help please

Question: Why did you not check the current flow after replacing the fuse?

if this neighbor would have taken it to the Dealership, he would have got a new fuse and $1000 bill HAHA.

hey, where are u lacated? i want u to check my s10 P0300 code

I need you to come and work on my truck.

How much for one hour fee

I wouldn't let Matt from Schrodingers Box hear you say a fuse blew from anything other than current draw. He called me every name in the book and a disgrace to my profession for suggesting a fuse can just blow from age, heat cycling and outside influences other than current draw. There is also such a thing as inrush weakening, far be it for me to even try to explain that to him, I imagine I would suffer even more insults. These fuses live in a very harsh environment and anything is possible. In my 35 years of servicing electronics I have seen open fuses that just can't be explained by anything other than "it was its time" then I got all kinds of straw man arguments about engine fires and some other non sensical stuff to the contrary coupled with more insults. You do always have that "somethings wrong" in the back of your mind but time says otherwise when it never happens again.

Спасибо.

*GRAVY*

If it takes longer than an hour, do you ask the customer to authorize each additional hour ?

What happened to your shirt lol 😂

what is your standard one hour fee down there

Did you check the resistance of the heaters? I'm guessing not

Where's the saturn and the mystique?