GMC Envoy: Hard Start When Hot & Low Fuel Pressure

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

Рет қаралды 124,869

Күн бұрын

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.

Пікірлер: 430

@Buckswoodshop Жыл бұрын

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

@duanek9892 Жыл бұрын

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

@dmc6419 Жыл бұрын

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

@MrSpartanicus Жыл бұрын

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

@antonoudenhoven7573 Жыл бұрын

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 Жыл бұрын

Hope that all goes well.

@jamespfitz Жыл бұрын

Looking forward to your thoughts on Part 2 when it arrives

@seastacker8582 Жыл бұрын

“Temp is just right outside”. 😂😂

@chrislangstaff Жыл бұрын

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

@dans_Learning_Curve Жыл бұрын

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

@brianvance7223 Жыл бұрын

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

@spelunkerd Жыл бұрын

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 Жыл бұрын

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 Жыл бұрын

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

@mph5896 Жыл бұрын

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

@peteschutza3566 Жыл бұрын

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

@farmboy30117 Жыл бұрын

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

@daveyio87 Жыл бұрын

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 Жыл бұрын

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 Жыл бұрын

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

@grannyflatgarage7599 Жыл бұрын

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 Жыл бұрын

@@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 Жыл бұрын

@@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.

@watajob Жыл бұрын

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

@Hey_Its_That_Guy Жыл бұрын

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

@daveogarf Жыл бұрын

MORE MRS. O, Please!

@lawrencepevitts2434 Жыл бұрын

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

@macklandtube Жыл бұрын

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 Жыл бұрын

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

@supersaiyenunlimit2 Жыл бұрын

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 Жыл бұрын

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.

@williamgagnonroadboxservice Жыл бұрын

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

@bradleybarnette9352 Жыл бұрын

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 Жыл бұрын

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 Жыл бұрын

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

@hackfabrication139 Жыл бұрын

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!

@bhash96530 Жыл бұрын

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!

@bigdaddymak1439 Жыл бұрын

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

@mmeter3 Жыл бұрын

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

@traumaman5150 Жыл бұрын

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 Жыл бұрын

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

@1chrisandrew1 Жыл бұрын

Nice one Lou. Good luck 👍👍

@pradolover Жыл бұрын

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

@SouthMainAuto Жыл бұрын

Best of luck out there man!

@leighpike6572 Жыл бұрын

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

@advancedleveldiagnostics Жыл бұрын

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 Жыл бұрын

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

@theadmiral5425 Жыл бұрын

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

@2023TMc Жыл бұрын

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

@robpeabo509 Жыл бұрын

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.

@rickbaker4571 Жыл бұрын

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!!!

@turner0224 Жыл бұрын

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

@Thomas_jefferson69 Жыл бұрын

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

@darktoadone5068 Жыл бұрын

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!

@CharlesReiche Жыл бұрын

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

@charleshenshaw9099 Жыл бұрын

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

@richardwarnock2789 Жыл бұрын

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!!!; )

@fascistpedant758 Жыл бұрын

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 Жыл бұрын

Mmmmm

@ernestrollins383 Жыл бұрын

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

@schutzhund3933 Жыл бұрын

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

@Rambogner Жыл бұрын

Stalker?

@ThePhoenix198 Жыл бұрын

* knuckle 😉

@J_M3444 Жыл бұрын

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

@barry009 Жыл бұрын

Mrs “O”…… “Don’t be weird!” Great advise to receive from your wife. 😆 lol

@gilberesrepairs Жыл бұрын

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!

@jorgefernandez-mv8hu Жыл бұрын

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

@itsmymillertime182 Жыл бұрын

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

@89hondaguysi Жыл бұрын

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

@johnlenoir1023 Жыл бұрын

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

@JohnB-zu5pr Жыл бұрын

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.

@dr.shorty8765 Жыл бұрын

Always good to see Mrs. O

@robertmedina6875 Жыл бұрын

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

@jo300hn Жыл бұрын

Looks like we got ourselves an Envoy.

@290wayne Жыл бұрын

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

@AC-gu7rg Жыл бұрын

Great video Eric , stay safe !

@satguy Жыл бұрын

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

@arjanvanraaij8440 Жыл бұрын

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 Жыл бұрын

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

@mikegordon3436 Жыл бұрын

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

@Cragified Жыл бұрын

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 Жыл бұрын

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.

@karlgoebeler1500 Жыл бұрын

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

@maxxmich Жыл бұрын

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

@andrewbaruth2318 Жыл бұрын

Nice seat covers!

@mikechiodetti4482 Жыл бұрын

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

@TeemarkConvair Жыл бұрын

loud eh?

@Vintageguy73 Жыл бұрын

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 Жыл бұрын

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

@Vintageguy73 Жыл бұрын

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

@jerrycurtis2310 Жыл бұрын

John did you get the email I sent??

@SouthMainAuto Жыл бұрын

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

@danhazlett1064 Жыл бұрын

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

@A2Wx8 Жыл бұрын

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

@benjaminstockton3917 Жыл бұрын

Awesome Eric O. Appreciate the videos buddy 👍

@rmc5278 Жыл бұрын

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

@renerivas3619 Жыл бұрын

Erik. Awesome video 👏

@kjbunnyboiler Жыл бұрын

Afternoon EricO

@clintletendre5585 Жыл бұрын

Like the Saskatchewan plate on the wall!

@dans_Learning_Curve Жыл бұрын

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

@jamesevensen7565 Жыл бұрын

Thank you Misses O. That was good

@lalitoojos Жыл бұрын

So informative again thanks mr o

@shaneanderson1036 Жыл бұрын

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

@CaseyWalt Жыл бұрын

8:25. Wheel bearings go brrrrrrrrrrrrr.

@ThunderbirdRocket Жыл бұрын

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

@crsuperman1 Жыл бұрын

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

@brandonrhodes6320 Жыл бұрын

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

@brianskitch Жыл бұрын

Beautiful looking PRNY cornfields!

@patrickzadd5215 Жыл бұрын

Eric. another puzzle…. solved

@onenuttybuddy Жыл бұрын

Thanks Eric. See you on the flip side.

@ronwatson4902 Жыл бұрын

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

@garthbutton699 Жыл бұрын

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

@mrkttrdr2919 Жыл бұрын

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

@marktryer315 Жыл бұрын

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

@reese8752 Жыл бұрын

Mrs O wants her pan back.

@bryankeating8440 Жыл бұрын

Nice video my guy

@crownhic6827 Жыл бұрын

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

@amber07701 Жыл бұрын

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

@jamesbruno5896 Жыл бұрын

Chevy thunder & Mrs. O! 👍

@jaybaker4447 Жыл бұрын

Again a very good video

@maticarne Жыл бұрын

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 Жыл бұрын

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

@mscir Жыл бұрын

Well done.

@nicolec7290 Жыл бұрын

You have some good videos

@oldman-zr2ru Жыл бұрын

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.

@TheOmegaman69 Жыл бұрын

Good video. I wonder why you did not look closer at the fuel pump current capture. If you lower the voltage and zoom into the waveform, maybe capture with a faster setting (I am sure you know all this and have done it many times) you could see if one or more commutators are bad or not. This, I think, would provide a definitive answer as to if the fuel pump is bad, IF the scope capture did show one or more bad/missing commutators. Maybe part of the reason why you didn't might be you would have to pull the Picoscope out to see it well enough, which takes more time. Understandable. What you have done does already show it is most likely the fuel pump if it is getting power and ground, and it is pretty definitive as well. Just something I wondered about. Anyway.... Thanks for making these videos. Especially lately, you have been making a considerable number of videos and they, are each and every one of them, are truly appreciated. Thank you. Omegaman

@SouthMainAuto Жыл бұрын

All good advice :) Thing is, looking at it like we did with 1 second across the screen we would have easily seen a "missing" section on the commutator as the amperage would have had a drop right to zero then right back up. It would have been very "narrow" but all the same it would have been captured pretty easy. I was just looking more for overall current than I was a "bad motor" if that makes sense?

@TheOmegaman69 Жыл бұрын

@@SouthMainAuto Yes, that makes perfect sense. It is a little difficult to tell what the settings are on the scope sometimes, or maybe I should pay closer attention. Thanks for your response, and again, for making these videos. Omegaman

@jameshalsell556 Жыл бұрын

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

@shirmworm Жыл бұрын

You're good!!!

@FredTheLutinoCocatiel Жыл бұрын

New commercial content had Pocahontas in it hahaha

@DeweyCheatumNHoweLLC Жыл бұрын

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

@NickMyers1 Жыл бұрын

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.