Pontiac Torrent (stalling, O2 and EGR codes)

[@GeminiSeven43]

Great Video but I was getting nervous watching you untape that EGR wire loom right over the fan belt while running. Stay Safe Danner!!!!!! You Rock!!!

[@rhkips]

The "brake booster" issue you're seeing there is quite common in Speed Density systems. Some GMS, in particular, are quite picky about it. My daily driver is a '98 Grand Am (2.4L), and if I pump the brake pedal briskly at idle, it'll stall the engine out. I've been able to replicate this on several other MAF-less GM engines as well (I primarily work on GM vehicles as a freelance tech). Without a MAF to calculate (or confirm) incoming air details, the engine is relying entirely on the MAP sensor, which is sensitive as heck to changes in vacuum, and responds -very- quickly. Here's another way to look at it: Take two cars; one purely MAF-based, and one purely MAP-based. If you unplug a vacuum line from the MAF-based car, the engine stumbles and idles terribly. If you unplug a vacuum line from the MAP-based car, it immediately brings the RPM up to compensate for the extra air. Every time you depress the brake pedal, you're introducing a momentary massive vacuum leak into the system. A speed-density engine will very rapidly compensate for that sudden decrease in manifold vacuum, whereas a MAF system won't even know the event has occurred. I haven't had a chance to test this on a MAF-MAP system yet, unfortunately, so I don't know how that will respond. It depends on which sensor takes precedence, and how the computer decides to handle the momentary inconsistency between the two sensors. I can't verify, but I imagine that the computer is aware of when the brake pedal is being pressed on most OBD-II cars.

[@irishgreasemonkey8397]

really appreciate the time and effort that you take to make your videos. I am sure your premium channel is excellent i just need to make sure i have the time. Thanks

[@georgedawsonjr450]

Hi Paul danner, I was looking over the videos I saw one where you started to go into your thoughts and process on where to begin on the starting to check out the vehicle and where to begin on trouble shooting. I was thinking what about doing a video on that going into it more detailed. It would give more insight on how to begin and how to start diagnostics on a vehicle. I know people have asked me about that very same thing. I found I have trouble giving them a better understanding of my start process. It's hard to give them an explanation. Thank you for all your doing keep up the great teaching I still find I need help sometimes and I go back to your book and your videos for guidance. Thank you for everything.

[@ScannerDannerPremium]

@rhkips You have replies to your comment disabled so I'll post here. This is not a speed density engine. Thanks for the comment either way

[@miltonscornertobylove5068]

U don't talk too much instead u r very informative n I have learn n wacthed ur long videos, not gonna lie I fall as sleep sometimes but is bcuz am an old man lol. But yes u pack a lot of info n that's what people likes. Good job n thank you for ur videos👍👌 from Florida bigmilton

[@ScannerDanner]

+Milton Solis thanks Milton

[@XJRabbits]

Just a FYI there is a TSB for '05 & early '06 Equinox & torrents to change EGR valve & tube to an updated version which the one in the video has and why the harness was spliced in. I am about to swap my EGR valve & tube because tube has hole in it and sounds horrible. Also getting the start stall issue when it gets cold out and have to pump pedal to get it to turn over. I'll try cleaning the throttle plate and see if that helps Thanks for sharing.

[@scotthinnant2726]

Paul, great stuff you are doing. I have learned alot from your channel. Awesome instructor..... Please keep it up. Scott

[@toyotatechMDT]

Nice work. Multiple faults are a pain the ass sometimes. The customer sees one check engine light and assumes one problem! I suspect the diaphragm is leaking inside the booster, nice catch.

[@aliengranpa]

I just got the 4055 code last night. Someone smarter than me about these things said it will give me shitty mileage if not replaced. Is that all? I don't want to end up on the side of the road this winter

[@aliengranpa]

Also, any suggestions on the stabilitrax light coming on all the time? I don't lose power like many have reported, but it bothers me that it keeps coming on

[@shaikhuzer2755]

HI, i have a 2007 Pontiac torrent, the RPM is fluctuating as soon as it goes over 80/km and I feel push back in the power in the acceleration padel. There is no sign on the dashboard and I checked OBD there aren't any codes too. Can you advise what will be the issue?

[@SouthMainAuto]

Nice video. Guess I'm slightly confused or may have missed something in the video or previous comments. It appears that when the pedal (brake) is pressed the STFT briefly goes in the positive then steadies back out at or around zero. Isn't this normal as the booster uses intake vacuum to operate? Also have you looked at the same data stream (STFT & LTFT) on other vehicle while pumping the brake and seen similar results? I would suspect have a "bad" booster would have created a steady vacuum leak causing the STFT to consistently read high. On a speed density engine I know pumping the pedal repeatedly will momentarily increase the idle so I would assume on a MAF engine it would momentarily increase the STFT. At any rate did you replace the booster and see different results and also did you know there is a TSB on these for a updated fresh air hose for the rear valve cover and updated software to fix a P0171? Not busting you butt just curious more than anything.

[@bbmd2200]

Pumping the brake pedal will cause any vehicle to go lean. Ask me ho that happen, Idk.

[@njpowerstroke]

Mr Danner great video I hated tech video at first because I work the flat rate system lol but I enjoy your videos ur knowledge is amazing. Been watching ur brother channel very good video that for for sharing

[@gvvq-pi5ml]

Hi Paul to check if the brake booster works, pump the pedal a few times without the engine running, the pedal will then go hard, rest your foot on the brake, the pedal should go down when you start the engine, also is it worth blanking of the vacuum hose?, hard to say about egr valve, prob safer to fit one, eliminate it, sounds like this Guys is going to get a high bill.......Fred uk.

[@newfieledman9164]

the wire's that connect in to the egr well i have noticed as well someone has changed it as well cause of all wires are white so i removed the tape and then seen the wire on the harness there is a Orange wire, Brown Wire, and i think 3 grey wires.

[@johneverett957]

Hi, could you explain what you want to see for EGR data. The error percentage, actual and commanded. If you know much about the 3.4 in the equinox specifically. Thanks.

[@GeminiSeven43]

Just curious, after the EGR stared working again would it be wrong to clear the EGR codes to see if they come back?

[@ltkaffey]

Hey Paul,The wiring harness on the EGR may have got damaged on some moving part and pulled on the EGR and damaged the connector on top of EGR.

[@MrAsadEp]

How did you know to check the brake booster? Prior knowledge or did you eliminate everything else first? You usually go through your thought process...excellent work as always

[@ScannerDanner]

Unfortunately I did this one in hind sight. I should have filmed it live as I usually do. My thought process comes out better when I do that. It was a combination of things that put me in that direction. One was the pontiac g5 I referenced in the video (another case study I did with the brake booster being the cause). The second reminder was using the troubleshooter for a lean exhaust code on this car as I was looking for common faults. The suggestion was to look at the brake booster o-ring. (not exactly my problem but it reminded me of the brake booster). So I then stepped on the brake and held it (initially I did not need to pump it to achieve the exact lean condition I saw in the freeze frame data) and bingo! I found my issue. So again, I wish I would have filmed it live. It would have been more clear.

[@MrAsadEp]

ScannerDanner Ahh makes sense now, I have never seen a problem like this in the UK nonetheless I will add it to my mental check list. Thank you for clarifying, all the best.

[@dreamer2355]

Great video as usual :) My wife knows your voice now. "Watching Scanner Danner again?" she says, lol.

[@rbarr1200]

Mine too haha. There's a vid where he's in Pete's shop and scannerdanner says "hey Pete" like 20 times and my wife was sitting next to me. Now she always says hey Pete !

[@1quickchevy2]

Is that motor drive by wire? I'm assuming so since you cleaned the throttle plate and not an IAC passage.

[@basketballgod5947]

Can someone tell me where the TCM and the ECM is on this vehicle. 2007 2 wheel drive

[@brandontracy9621]

Paul what are your thoughts on terminal fretting on GM connectors? GM has released several bulletins and recalls to apply dieelectric grease on the connector terminals to prevent microscopic terminal movement causing debris to build up between the male and female terminals and causes an open or high resistance. I thought it was just a crazy theory, till I turned off an airbag light immediately after wiggling a yellow airbag connector under a seat on a vehicle that has not had a airbag connector recall performed on it yet. I made sure the female terminals weren't spread open either.

[@ericolson3768]

Thank you paul like all of your lessons

[@WagsAutomotive]

I have an 08 Pontiac Torrent with only 70xxx miles on it. It randomly dies while driving. Turn the key to start, nothing happens. Then a day or two later, it will start as if nothing is wrong. Ever seen that before? What did you do to fix it. I have several videos on my channel, bit still haven't resolved it.

[@ScannerDanner]

When it is not starting is when you do some testing! What testing have you done?

[@CrystalDawnNinjaTurtlePrincess]

what would cause a 09 torrent to only crank unless i hold the pedal to the floor an when it does start it is flooded an running rough every time i turn the car off it does this

[@ScannerDanner]

There are multiple causes for this condition. I would need things like fuel trim data, fuel pressure readings, fault codes etc to be able to help you.

[@maxhoang9439]

Please can anyone to know how to find out where is the area the engine number is located

[@eNeVeFamily]

Getting an Equinox was one of the worst decisions I've ever made. All types of problems..

[@siloeservice]

How to share the scanner screan in this video

[@TexasPLNR]

Do you charge based on piece work or time required to remedy the problem? Piece work absolutely requires setting a price per item!

[@prnd21zinman37]

I wonder sometimes, the better we get thru the years, and the more thorough we are, and the more predictive power we have, the more precise we are in finding a fault down to the core,is it possible to earn less? Sad to think so but Im pretty convinced it can go that way.

[@billsmith5641]

Great videos Paul, the T pins you use for back probing connectors, what size is best..

[@jonathanlessard5517]

great video Paul!I wonder if you have a video about a P1776 on a Chrysler LH platform from 1998-2004, i have a 2004 Concorde and the transmission goes in Limp mode. most of the time it need a new soleinoid pack but i wanted to do my own diagnosis!.

[@trublue2319]

When you command the egr solinoid on are you supposed to hear a constant ticking?

[@ScannerDanner]

For a pulse width modulated one, yes

[@trublue2319]

@@ScannerDanner new EGR says computer needs to be reprogram or erratic signal that's what am getting I cleaned the codes disconnected the battery car came back like 4 months later are scanner can't program

[@JOHNPHUFNAGEL]

I have grand prix that has same egr codes customer changed it 2 times. my question is when I rev it up the EGR position changes without being commanded what on earth would cause that? the des egr position stays at 0

[@ScannerDannerPremium]

JOHN HUFNAGEL the valve is bolted on backwards and vacuum is pulling it open

[@JOHNPHUFNAGEL]

yea that's what I thought to but I took it back apart to look at it and it is not backwards and the customer said he didn't take it apart, I also was checking out a s10 over the weekend and it too was moving with no command

[@ericgraz6089]

why did the scantool only allow you to to the egr test for 30 seconds?

[@ScannerDannerPremium]

To limit damage to the converter and environment

[@checkengineautoservicios8212]

apesar que no hablamos el mismo idioma tu forma de enseñanza es muy buena cuanto desearia que seas mi maestro y te felicito por ser una persona muy aplicada a tu profecion sos el mejor seguido de erickeventhough we do not speak the same language your way of teaching is very good as you want to be my teacher and I congratulate you for being a person applied to your very profecion're the best followed by erick

[@grandpoopy1]

to jhonny: speak american,damnit

[@smogtektrekkie8337]

Where did u get that smart board ? Is it blue tooth or wireless?

[@newfieledman9164]

Had to get my 2006 Pontiac Torrent 3.4 l v6 Engine rebuilt cause of a blown head-gasket and i got all brand new Sensors replaced last week, but i am getting a check engine light code P0171, lean on Bank 1, do you have any idea's that may help to find the problem. after replacing all of the sensor's, i am getting that code of P0171 i erased the code last week and today the light on the dash came back on. it is the same code P0171.

[@jadedallion8107]

Got the same code and gonna get it checked out.

[@newfieledman9164]

@@jadedallion8107 I Sealed silicone gasket maker Around the PVC valve go in cause of where it was loose on my engine valve cover it didn't make a difference, but they say that it could be the Vacuum leak there but also might be the other Valve cover there is a hard plastic Tube that go in to that one and most of the time it leaks vacuum leak accrues there as i check online but i'm to short to reach in behind of the engine .

[@sheldonbertram2206]

I need help. I have an 06 torrent it is missing and stalls sometimes and runs fine other times. I am getting a bank one too lean mad air flow low voltage and multiple misfire. I have had it to the mechanic 3 times he can't find it. We have a baby due next month and need the car badly. Can you please help.

[@ScannerDanner]

I would love to help you. Are you near the PIttsburgh Pa area? I wouldn't even charge you. We take outside work in at the school I teach at.

[@sheldonbertram2206]

ScannerDanner I am in east tenn.

[@ScannerDanner]

Not much I can offer you then. Too many variables and too many back and forth emails to help you here. But my forum could be the answer for you. I have like minded people helping me there. You will be expected to at least have a global scan tool, multimeter and a way to test fuel pressure at a minimum. (all inexpensive tools, you can even rent fuel pressure gauges) It is free to join my forum. Hope to see you there. www.scannerdanner.com/forum/post-your-repair-questions-here.html

[@ahill007ny]

Wow!!!!! Nice!!! Hey Paul I have a 1999 Lexus es300 VVT with the brake booster doing the exact same thing when I pump the brakes fuel trims shoot to 19%! Also lately it will run for 5-10mins then stall. Once it stalls it will not restart, if I wait 10mins it will start with no problem. While it's a no start I did check for an RPM signal and there was none. It sounds like a Crank Sensor, however I'm not sure. Any idea what might be happening? Thanks love your videos!

[@ScannerDanner]

find out what you are missing when it doesn't start. Do NOT rely 100% on the RPM test during a crank. Watch my Lexus video where I show how to test the igniter

[@ahill007ny]

Thanks I watched all your videos. I'm going to watch the Lexus video again it has been a while. Today when it was a no start there was no spark. I remember in the Taurus video you did say that the RPM test while cranking can be misleading. While I was looking at it I asked myself what would ScannerDanner do next :)

[@ahill007ny]

Hey Paul It ended it up being the crank sensor, now on to the brake booster. Thanks again.

[@cherylluster922]

How you no if it’s your ignition instead of your starter

[@ScannerDanner]

This video is not about a starting system problem, not sure what you are asking me, sorry

[@prnd21zinman37]

Even a wiggle test isn't so black and white. If it wasnt hard enough now you gotta throw in the butterfly effect. Im the same way. Sucks when you,re so confident and then for the sake of being absolutely correct sometimes we can obsess.

[@ScannerDanner]

So true my friend

[@Travisfromoregon]

Would be cool to see you do a egr problem on a 90's honda with equal length egr runners plugged causing a dead cylinder. lol

[@tbawalker]

Great video!

[@thetruthspeaker5101]

When you replace the EGR valve on the Equinox on certain years you have to replace the clamp connector because they do not match , so that is why the wires are spliced

[@sherrysbooks]

Is that the case for Pontiac Torrents as well? I have an 09 that we've determined is something with the EGR system. But I'm unsure if it's the valve, sensor, or line/ tube. I really don't want to buy all 3 if I don't have to.

[@torcher78]

If all 4 wires have been repaired chances are that that EGR is a aftermarket part in which case rarely comes with the factory style harness connector and almost NEVER allows you to erase the code!!!!

[@todayintheshopbanksy5904]

People, the choice is this. Watch Scotty Kilmer for free or pay to watch Scanner Danner Premium. Actually that isn't a choice. No-one should have to watch Scotty! lol

[@ScannerDanner]

+WhitwellMike B lol

[@estrelladelnorte1308]

very nice!

[@martinarrieta7779]

grate video

[@moshe2002]

thank you

[@jesusmalagon4336]

thanks

[@ryad1717]

EGR damage you need new EGR part.

[@behelia]

I can literally see the cracked brake booster vac line

[@prnd21zinman37]

All things equal. BTW

[@clarkgarber5495]

Those tubes crack and leak.

[@njpowerstroke]

Love the comment about the angry face

[@1quickchevy2]

Is that motor drive by wire? I'm assuming so since you cleaned the throttle plate and not an IAC passage.