GMC Envoy: Hard Start When Hot & Low Fuel Pressure - Part I

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In this video I have a look at a customers GMC Envoy XL with the big 4.2 that came in with a complaint of, "MIL on and hard to start after it is warmed up."
A quick test drive leads us right to the answer. It's looking like a fuel delivery issue but we need to drop the tank and run a few more checks.
-Enjoy!
Part II: • GMC Envoy: Hard Start ...
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Disclaimer:
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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26 июл 2024

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Комментарии : 430

@MrSpartanicus Год назад

Tell Phil the comment section demands that he formally introduce himself, lol. Then Eric, you will no longer feel weird making videos around him. 😎

@duanek9892 Год назад

For a second I thought Mrs. O came out to bust you for using her cake pan.

@Buckswoodshop Год назад

Mrs. O quote of the day, “Don’t be weird” 😂

@dmc6419 Год назад

Busted using Mrs O's casserole pan in the shop again!

@spelunkerd Год назад

It's funny how you can stand up in front of millions of people and explain what you're doing, but when somebody you know from the 'real' world listens in, you feel a little self conscious. Phil probably watches, too, ha ha.

@wallingj68 Год назад

But camera's don't talk back normally, and they're a bit less judgy too. As far as I know a camera won't stop recording if you don't torque a bolt to factory specs, or possibly say something that is politically sensitive to a small number of viewers.

@SouthMainAuto Год назад

I know right haha. I'll talk to the camera all day but I'll be darned you put me on stage...

@mph5896 Год назад

Professor Phil. Shy around the teacher. Mr O is a teacher though, so they are equals.

@dans_Learning_Curve Год назад

Mrs O is always a welcome guest star! You definitely married well!

@seastacker8582 Год назад

“Temp is just right outside”. 😂😂

@farmboy30117 Год назад

I know how you feel, I have a heck of a time making videos in front of people...especially my wife ;)

@antonoudenhoven7573 Год назад

Watching this from my hospital bed. Tomorrow big lung surgery This helps me set my mind a bit of it. Keep your video's coming Eric.

@jimburgess9205 Год назад

Hope that all goes well.

@jamespfitz Год назад

Looking forward to your thoughts on Part 2 when it arrives

@brianvance7223 Год назад

Dont be weird....Man, we are all weird in our own way !! Liked the video

@bhash96530 Год назад

My father in law does youtubes at work, solar projects, and drone videos. I don't like to be on camera so I duck when the camera comes out!

@chrislangstaff Год назад

"Just don't be weird" "No can do, lady"

@daveogarf Год назад

MORE MRS. O, Please!

@Thomas_jefferson69 Год назад

Ms. O aint going to be making any casseroles in that pan any more.

@williamgagnonroadboxservice Год назад

Let’s meet Phil As a fellow teacher working my off time during summer vacation to better my own knowledge I can understand his reasoning. See the new stuff and a lot of the old stuff that’s happening with the cars out there today teach the young students about those problems during our classes

@bigdaddymak1439 Год назад

Why do customers fib?? Just tell the truth we're gonna find out anyway! 😁😁 Great work Can't wait to restore some Chevy THUNDER ⚡⚡⚡⚡

@hackfabrication139 Год назад

Aaaaaah.... The infamous GM fuel pump. Had one go out on my 2002 Chevy Blazer (4.3) about 150 miles from home. One moment it was working, the next it wasn't. Crank, crank, crank, but no starty. Had the vehicle towed home (to the Chevy dealership). Where it proceeded to start and run for the next three days. Just as they were fixin' to call and have me pick it up, it wouldn't start. My son's 2002 Silveraldo (also 4.3), did the same thing a few months later. Gotta love that timed obsolescence!

@macklandtube Год назад

Everything I got right here! I've got a 2002 trailblazer with 330,000 on it. These engines are beasts. No oil burning or leaks. Still getting 18 mpg. Change oil every 5,000 and use Lucas fuel treatment consistently. Live in rust belt and frame cracked from rust. I'm gonna weld it up and keep driving.

@philllsxga.7737 Год назад

my buddies has 216,000 miles, runs perfect!!

@supersaiyenunlimit2 Год назад

214k on my 05 Envoy, everythings great on it except a leaking rear main and the 4L60E is slowing crawling up on deaths door.

@thomasshaffer8547 Год назад

just clocked 160K on an 02 Trailblazer owned since new, and also recently replaced the fuel tank pressure sensor. Not in the rust belt and plan to keep this vehicle a long time.

@bradleybarnette9352 Год назад

Lol can hear the bearings on camera…..I live when the customer says “I don’t hear the noise you are talking about” or my personal favorite of all time “I don’t pay attention to anything while I’m driving” 🤣🤣🤯🤯🤔🤔

@stationaryenginesworldwide Год назад

great video Eric...if i was Phil i would be honored to be a part of the SMA team. Never let your life's path be sidetracked by a stone in the road ...you're doing what you were meant to do. And you do it so well ...like i said i am sure Phil is honored to be in a shop that stands tall on the Web .

@SouthMainAuto Год назад

Interesting you'd make a "stone" reference haha. Phil is a good dude, I am just a little shy I suppose.

@2023TMc Год назад

Hey we’re all a bunch of weirdos 😂 that’s why I watch the channel! Thanks for the educational videos sir.

@turner0224 Год назад

What do you think about the ThinkTool ? Ivan’s heart and soul ha ha ha

@peteschutza3566 Год назад

LoL! Don't be weird, Eric. That's a highlight comment from Mrs. O!

@lawrencepevitts2434 Год назад

I love it when you taking a vehicle for a test ride. I enjoy the scenery in and around your beautiful little town.

@daveyio87 Год назад

Thanks for teaching me 2 things in this video! About the o2 sensor should peg to about 1000mv during wot and that being that it went to 0 it was a fuel delivery problem. And the other thing was about an amp per 10psi for the fuel pump. You are one of the reasons why i continute to learn in this career. I may be 100% trained by GM but i still have a lot to learn!

@SouthMainAuto Год назад

So it is a sometimes but not always case. It is more like 0.8amps per 10psi (most of the time) and MOST vehicles go into power enrichment mode at WOT some stay switch the O2's but none that I know of drop to 0v's

@jeremyhanna3852 Год назад

You might b gm trained but you need years of the school of hard knocks were you learn by doing

@grannyflatgarage7599 Год назад

Those were good lessons! Sorry for a bit of a newb question but why does the O2 pegging out at WOT mean that it can't be a vacuum leak?

@jeremyhanna3852 Год назад

@@grannyflatgarage7599 a vacuum leak can make the 02 peg early as there's unmetered air getting the system designers for the most part will desgin w.o.t to match top out put of o2 sensor if you find a vechicle that has pegged o2 sensors at half throttle its either a vacuum leak because the engine is receiving enough air to Maximize the 02 its just getting in a way the computer dont understand or its bad o2 sensor it think half way is pegged out

@donwasse7892 Год назад

@@grannyflatgarage7599 WOT means the throttle plate is also fully open, there is very little to no engine vacuum during this. Engine vacuum is created by the intake stroke trying to pull air past a restriction (the throttle plate). Diesels don't have a throttle plate, hence no vacuum from them, same idea.

@theadmiral5425 Год назад

Using the ThinkTool I see....I thought you were a Autel guy. I bet this will put a smile on Ivan's face.

@rickbaker4571 Год назад

I LOVE the recent comments here at SMA... "I would have put a new fuel pump in it as soon as I looked at the vehicle because my GM-spidy-senses knew that was the issue". Thanks for bringing us MR O and the comments should cost us a couple of bucks, just for the comedic value!!!

@mmeter3 Год назад

always great to see Mr and Mrs O on the job..........

@darktoadone5068 Год назад

Scan tools are so valuable to have, in the old days they would just guess and keep changing out parts until......oh hey look it works!

@dr.shorty8765 Год назад

Always good to see Mrs. O

@charleshenshaw9099 Год назад

It should be interesting when you drop the tank and we see what the other shop did.

@watajob Год назад

Mrs. O's deadpan delivery on the locker room was perfect!🤣🤣🤣

@traumaman5150 Год назад

Great video as usual. You have inspired me to return to this field. I am 52 people call me nuts. they are probably right but I feel good about this we will see how it goes. Thank you.

@jamespfitz Год назад

The world needs more good, honest mechanics. Even old heads.

@1chrisandrew1 Год назад

Nice one Lou. Good luck 👍👍

@pradolover Год назад

Good luck mate! Wish I could do that one day!!

@SouthMainAuto Год назад

Best of luck out there man!

@leighpike6572 Год назад

Much the same for me, bit older and back working on heavy commercial vehicles, cars are only a side job for now

@robertmedina6875 Год назад

I love this video Eric! You are getting better and better at your craft of teaching and repairing! God bless SMA!

@johnlenoir1023 Год назад

And definitely going to be interesting to see how this one turns out I love it please continue

@JohnB-zu5pr Год назад

Love to see a car I own in the shop. I get a lot of pointers from you and that in return helps me get a better diagnosis of a possible problem I may have.

@shaneanderson1036 Год назад

Another top tip segment on how codes are never straight forward .. love this channel . Australia

@robpeabo509 Год назад

Nice to hear Mrs O's pragmatic thoughts - "it's not as though you are getting undressed together", "Yes you are being" weird" and the "Don't be weird" advice. I guess she left her sympathy, empathy & heart at home that day. I feel for you Eric.

@maxxmich Год назад

well thank the state for the great roads we drove on... here in Michigan are like the moon..... Crater City!

@crsuperman1 Год назад

Seeing the boss lady in your videos ads the icing on the cake of a sweet video already I just sit in amazement at all your tools..... Thanks for another great video Mr o

@ThunderbirdRocket Год назад

Excellent tutorial - THOROUGH ! Much appreciated . Enjoy your day 👊🏼 !

@Hey_Its_That_Guy Год назад

Boy, was she pissed you stole her cake pan...again! 😄

@schutzhund3933 Год назад

Was following you on the testing, then you took it next level! Suddenly felt like a knuckle dragger!

@Rambogner Год назад

Stalker?

@ThePhoenix198 Год назад

* knuckle 😉

@AC-gu7rg Год назад

Great video Eric , stay safe !

@garthbutton699 Год назад

The jury is out,can't wait for them to convein,great content as usual🤗😎🤗😎

@CharlesReiche Год назад

Right into the fuel trims. I thought I was watching Pine Hollow Auto Diagnostics channel there for a sec.

@jorgefernandez-mv8hu Год назад

Thanks for the tips. I always learn something from watching your channel. Keep them coming.

@advancedleveldiagnostics Год назад

Thanks Great video! You can look at the amperage spike when the pump turns on to give you an idea if the power and ground is good. If it spikes to around 20 amps you know it can carry a decent load.

@SouthMainAuto Год назад

Yeah never thought of looking at the inrush current. Good tip man!

@rmc5278 Год назад

did mrs o just kick mr o's ass for using her baking tray 😆

@ronwatson4902 Год назад

Like Chicago said: Make Me Smile! Thanks for sharing!

@richardwarnock2789 Год назад

You mentioned taking it for a Shake kinda heard that if that accures with no A.C. is that referred as a Shake - N- Bake cause Summer Time's Lovely Warmth as a Viewer's Ride along as the Help He Hehe!!!; )

@290wayne Год назад

Love your videos an the way you find the problems. Your amazing... Thanks for sharing ....

@mazzg1966 Год назад

It's weird how much I thoroughly enjoyed this video! Ha ha ha ...new guy thinks you are talking to yourself...oh and by the way we are watching too...ha ha ha thanks Eric & Mrs. O that was fun!

@brianskitch Год назад

Beautiful looking PRNY cornfields!

@J_M3444 Год назад

“Temperatures are just right outside 😎”, “immediately starts revving engine” That’s my guy right there

@itsmymillertime182 Год назад

Always need to drop the tank when it is full. Just like death and taxes.

@gilberesrepairs Год назад

I know exactly what you mean with Phil. I have recently started a channel and i feel stupid talking to myself in the garage when my neighbours are out in their garden 😂 Feeling stupid from the other side of the pond 🇬🇧 Excellent video as ever!

@A2Wx8 Год назад

Wow, those wheel bearings! And here I am getting a slight rumble from one wheel and stressing over it.

@renerivas3619 Год назад

Erik. Awesome video 👏

@mrkttrdr2919 Год назад

Good stuff, like the testing process to go thru for high fuel trims, will eagerly await pt 2, thanks for posting, good to see the women in black

@crownhic6827 Год назад

Boozin at work and has good advice. She’s a keeper.

@andrewbaruth2318 Год назад

Nice seat covers!

@marktryer315 Год назад

Hey Eric, thanks,it's like going to school!

@benjaminstockton3917 Год назад

Awesome Eric O. Appreciate the videos buddy 👍

@jamesevensen7565 Год назад

Thank you Misses O. That was good

@amber07701 Год назад

Looking good with the video content. Don't need to feel wierd Bout the videos, you have been doing this for years now, only newbies should feel that way. Looking forward to the fix if/when you do get it

@mikechiodetti4482 Год назад

Good diagnostics. Hopefully a part 2. Those bearing are horrible!

@TeemarkConvair Год назад

loud eh?

@onenuttybuddy Год назад

Thanks Eric. See you on the flip side.

@lalitoojos Год назад

So informative again thanks mr o

@karlgoebeler1500 Год назад

Has to be Aunt Slappy Only a mean old squirrel would build one in a GMC

@danhazlett1064 Год назад

I really appreciate that you do an actual load test not many good mechanics left. THANKS

@jameshalsell556 Год назад

Man! those wheel bearings are so bad I thought you had it in low gear for a second there!

@kjbunnyboiler Год назад

Afternoon EricO

@bryankeating8440 Год назад

Nice video my guy

@oldman-zr2ru Год назад

I just did this with my 99 Yukon, lean codes, drivability problems and then no start, no hear the fuel pump turn on. But the real indication is he just filled the tank like my daughter did, thirty gallons of gas, siphon it out the old fashioned way. Of course I don't have a lift so get out the jack stands and do it the hard way. Ah well, a new pump is $250 for OEM and a day's labor and I saved myself $750 in labor.

@brandonrhodes6320 Год назад

Nice job didn't know about 10psi per amp as a rough estimate

@jaybaker4447 Год назад

Again a very good video

@vaughnstevens8396 Год назад

I cant wait for the next video

@ernestrollins383 Год назад

12:50 "What's up Mrs O" while you hope she doesn't notice you using her cake pan to catch fuel in. :D

@NickMyers1 Год назад

Those wheel bearings sounded like it had some mudders on it haha. Wow. Chevy thunder sounds better with 8 cylinders thumping away! Good luck with the future fuel pump replacement.

@clintletendre5585 Год назад

Like the Saskatchewan plate on the wall!

@fern3056 Год назад

I want to see the follow up… I need closure… thanks Eric I always learn something from your videos…..

@mummabear01 Год назад

I always look forward to the cameo appearances by Mrs. O.

@maticarne Год назад

Smart move Mr. O on rolling down the window.. I used to valet cars on a ski resort and got myself locked out twice on one of those, good thing the resort had AAA

@thomash1923 Год назад

In my shop I have a large sign that tells folks to roll down their window. Don’t want the keys locked in. Again….

@richardfoster9499 Год назад

Love ❤️ my sma videos, I tease my daughter all the time. I say we're watching south main auto all day. She's like nooooooo I want to watch cocomelon 🤣🤣🤣

@nicolec7290 Год назад

You have some good videos

@satguy Год назад

Unless they're not available anymore, there are certain parts you just don't install aftermarket, the fuel pump is one of them.

@arjanvanraaij8440 Год назад

Well sometimes you do install a aftermarket fuel pump, pump oem for my KTM 500 euro aftermarket same fit and all 50 to 100 euro depending how fast you want it to be deliverd.

@ferrumignis Год назад

The more difficult the part is to fit, the more you want to avoid aftermarket junk.

@mikegordon3436 Год назад

I put 2 delphi fuel pumps in my envoy both failed in 3 weeks. Put a ac Delco on and all is good

@Cragified Год назад

There is nothing wrong with QUALITY aftermarket fuel pumps. The thing is those you find on fleabay and amazon are rarely Quality. If the part is 1/6th the cost of the part straight from the OEM (Not talking from GM price) then there is a reason it is 1/6th the price, they cut corners on a lot of stuff and materials.

@FishFind3000 Год назад

I put on 2 water pumps and both were defective from factory. Oem fixed it and no issues since. Same with an aftermarket crank sensor. It worked worse then the oem one that was going bad.

@fascistpedant758 Год назад

I think Paul Danner would suggest that you look at inrush current upon starting the pump. A low spike would indicate high resistance before the pump, a normal spike would indicate a good power feed to the pump.

@johnskuse406 Год назад

Mmmmm

@bigtruck57h25 Год назад

Damn..... You beat out Rainman today. Ray is MIA. This customer has obviously gone full Amazon Chineesium on this fuel pump, and has finally brought it to somebody who knows what they're doing. Greetings from Lake City 😎🌴🇺🇸

@Vintageguy73 Год назад

Being an old timer with limited electronic diagnostic experience, I would first check the fuel pressure then immediately make the call of a bad fuel pump.

@jerrycurtis2310 Год назад

Sup...John? These little projects are no stranger to you.

@Vintageguy73 Год назад

Hello@@jerrycurtis2310 lost your contact info, give me a holler!

@jerrycurtis2310 Год назад

John did you get the email I sent??

@SouthMainAuto Год назад

That's all good until it isn't haha. 95% of the time it's good, it is that other 5% that'll get ya

@shirmworm Год назад

You're good!!!

@mscir Год назад

Well done.

@CaseyWalt Год назад

8:25. Wheel bearings go brrrrrrrrrrrrr.

@patrickzadd5215 Год назад

Eric. another puzzle…. solved

@gbedford Год назад

Ha! I've got the Isuzu 4.2 in my Ascender. No GM troubles for me :) But seriously, it's been a great SUV since we bought her new in 2006. I did have to do the left front wheel bearing, so I know exactly how that sounds.

@DeweyCheatumNHoweLLC Год назад

I'll be waiting for Part 2 Of the Perils of Pralines

@dans_Learning_Curve Год назад

Is that your rubber strip by Dollar General?! LoL 🤣😆

@89hondaguysi Год назад

I'm just here for the passive-aggressive "CHEVY THUNDER".

@Z71Garage Год назад

I had my stepper motors replaced in the instrument cluster fixed my issue. It's a common problem with those clusters on all gm clusters in that year range.