In this video we have a look at a Chevy Tahoe that came in with a customer complaint of high idle and misfire after the vehicle warms up. The customer already replaced TPS, IAC motor and spark plugs. After a little poking we nail down this diag and find out what is causing the problem. -Enjoy!
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If an SMA Video has helped you out please consider giving using "Patreon" to help support us. The videos take real time to create and pull us away from real work that pays our bills. CLICK HERE: https://www.patreon.com/southmainauto
CHECK OUT OUR "SMA SWAG" STORE! Go on Teespring and get your very own SMA merch!
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If you don't like Patreon feel free to use the "PayPal Me" link: https://www.paypal.me/SouthMainAuto
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AES Wave Automotive Diagnostic Tools: https://www.aeswave.com/cart.php?m=affiliate_go&affiliateID=2525b91fc8e906e8215984074c9d9e8f&go=https://www.aeswave.com/Miscellaneous-p9347.html
Thank you for all the continuing support!
--Eric & Vanessa O.
Feel like sending some swag to SMA because you love the videos but don't know where to send it?
Just ship it here:
South Main Auto Repair
47 S. Main St
PO Box 471
Avoca, NY 14809
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
It has high compression because it is full of oil.
Common problem, intake manifold gasket
Literally been having the same issue with my 00z71 tahoe (5.7) AND ITS BEEN DRIVING ME UP THE FUCKING WALL. because in addition to the slight misfire, it’s wrecking havoc with my emissions and I can’t register the damn thing without passed emissions. Thanks my dude. Going to repeat the steps you just showed and finally get a damn answer.
Mine just started doing this. 150k on it. I hope I find a mechanic as good as you
2008 Chevy Tahoe ruff idle & ticking but no engine codes. Can you suggest something for me to Check brother
lol iv never heard of somebody gettin irritated with somebody else for wanting their sticker i hope u could at least contain your cheery demeanor at least a little in front of her lol :p
You are probably the most talented mechanic I've seen on youtube. Your videos are part of the reason I wanted to go to automotive tech school. Thanks for the content and keep up the great work.
Bro you are an absolute beast mechanic no I'm a beast mechanic you're far beyond that I've never even heard of a smoke test the truck I drive right now I have put 50,000 miles on it and I bought it with what the owner thought was it bad head gasket and I diagnosed it and repaired it for $30 being a bad intake manifold gasket I've never seen a smoke test never heard of a smoke test and I'm having trouble with my truck now 50,000 miles later is why I'm watching this video my truck is idling high sucking twice the fuel with no check engine light I'm sorry you had a bad day but I had a bad day too and you just made my day you are a smart ass son of a gun you're an absolute beast bro I haven't finished watching your video but you're my dude from Burlington Vermont 399-6054
Terrific matey, bugger the whining fools,onya mate,luv what you do,truly!
Bled many brakes over the years wish I knew that digital bleed technique. Another great tip from. SMA. Thanks Eric
.
Another great episode Eric, thankfully decent people like yourself are still keeping things professional!
You're a good man, knowledge, ability and willingness..Thank you.
This was a very good video.. Enjoyed watching and learned some new tricks..
I’ve got a 96 with the 5.0 misfire on #7 but drive it for a little bit let it warm up it comes out of it .. any clue what that might be ?
If I wanted to keep my wife out of the shop I do a fuel pump and she not fond about gear oil too
So I have a P0300 code and I’ve been pulling my hair out, as I sit, my hands are raw and sliced up here and there… I JUST got back inside from a 40 minute test drive and have the same symptoms as before, I just spent 3.5 hours to take the manifold off, replaced the spider injectors and gasket and I’m still getting a choppy idle and P0300 with a P0155 that disappeared after the initial scan…
I torqued the manifold down to 44 inch pounds in sequence on the first go then 88 inch pounds on the final torque sequence…
I’ve changed the EGR, plugs, wires, distributor, MAF, air filter, crank shaft sensor, fuel filter and now spider injectors and intake gasket…
I really seriously could use a fresh look, advice, anything…
I live in Southern California I’m not sure if you know of anyone here that you trust to help me diagnose this but I’m desperate now I’m over $1,600 and I’ve had it…
Everyone is saying it’s the tps, it’s the ignition control module, it’s the cats delete the cats, delete the egr, go straight piped but I can’t mess with any of that in Comifornia…
It ran WAY better on the drive but at idle it’s super choppy and it does sound muffled but idk if it’s just the sound of the exhaust or what or how to check for a bad cat, no sulfur smell, no rattling… I’m out of ideas…
Note: After the 40 minute drive, WOT a couple times on the freeway where it ran better than before after coming to a stop it was still choppy and rough idling then while waiting in the drive thru it just shut off, tried to start it and it acted like it was it out of gas, pushed it, waited 10 minutes, cranked it and it started right up, drove a mile, shut it off then tried to restart it and it acted out of gas again, shut everything down, started googling… HEELP! 😭
vac leak
Any clue on a 2007 tahoe went to change motor mount and eve since have misfire and running rough at first wouldn't start found I didn't have ground and it was telling a buddy power to ground short I think he said on coil ground repaired broken ground on side of engine fixed it starting and have power and ground on on coils now starts fine but running like crap and it a stomp on gas it struggles and stabilitrack, traction, engine light comes on and stays stuck in v8 mode
Looks like you got the Big Bambu right there.
Hello Eric; My 03 Matrix has also developed a lost spark on it's 1.8L 4 cylinder engine. I shour hope it is not my intake gasket that is the cause. Have to try a smoke testing routine… Once again; thank you for the insight.
Had wiring going to the spider injectors go bad chased a misfire in customer van for a couple days in-between working on other customers vehicles, power probe was a life saver
The door needs gear oil
My toolbox is getting a fog machine and a disco ball,
pronto.
Another great video.
Maybe it has gears instead of pistons.
what scanning tool do you use
It's a gm. I always check the cigarette lighter fuse when no communication. Sometimes the scan tool works sometimes not
Hay I got the same engine and it runs good just when u go down the road it want idle What would make it do it it only does it some times
Would explain the high idle too
I learned a lot! Thank you! I'm new to Chevy's and I have a 99 Tahoe with misfire on cyl 5. New spark plugs, wires, cap and rotor. My plugs look just as wet, I also swapped out the plugs and it's still throwing the code. There was an intake leak but the gasket was replaced by my mechanic but I still get a misfire code. I'm replacing the ignition coil next (to complete the tune up) but I'm not very hopeful that will fix it. Engine doesn't sound bad at all either. Any tips/recommendations are greatly appreciated!
It's a gm. Of course it's going to need an intake manifold gasket. You think. Lol.
if you have a manifold vacuum leak it will cause a fast idle
— I'm gonna kill someone. Last time I heard someone say it like that, I was wearing the uniform.
Great video Eric as always thank you sir!
Cigarette guy! Ha ha ha🤣😄👏😎
Me thinking “what’s that gonna do?” Sma: “so what this is gonna do….” I love this channel
rough idle but no check engine light, p0300. Used a spark tester on the
drivers side and all have good spark, have not done the drivers side.
Had 1 semi hard start while using the tester.Any advice?
Good job on narrowing down the problem.
I had a Chevrolet Suburban that would flood it self after is warmed up. It was the temp sensor was bad since they have 2 sensor in the one unit one for the engine temp guage and the other that sends the temp for the Computer and fuel mixture.
I know I am a little late with a comment, But I own that engine 97 5.7L it has over 212,000 miles doesn't use a drop of oil, But I did a Felpro intake gasket and had a fuel injector stop spraying while a Fuel pump started to fail as I have replaced the fuel pump three times from 64,000m to 212,000 miles. After replacing all four oxygen sensors it ran like a new truck, also never use aftermarket ignition parts of any kind if you want it to run right, Demand AC DELCO parts only Trust Me it will save $ in the long run. Mind still runs like a top. In 2020😎 And Yes If you're wondering You're Video's are the BEST in 🇺🇸👍
when he held it up to the camera and said smell that, i sniffed, hahaha
Car can be pain in the ass at times
Its nice to learn the various ways to get to the root cause. You are an excellent teacher. Im surprised you dont teach diagnostics at your local Votech school!
Spider injection is the worst
Thanks for the ride along😊
Do you have any input about what adverts are displayed in your content?
From what I’ve seen you have a serious bed-wetting problem!
My brother had the same problem on his 1996 z71. He replaced this that and the other thing. His intake was really warped and once he replaced it the truck ran like a champ.
I once had a lean code on bank one and two..turned out it was the intake manifold gaskets because of how horrific my gas milage was..and noticed how it ran in cold and or at temp..I did the job myself and purchased fel-pro and never came back..thanks to you bud!! Appreciate the awesome work.
How possible would you say it is to have the problem you showed after new lower intake gasket, throttle body gasket and valve cover gaskets installed ? All cylinders are firing from a spark plug checker. Could there be a timing issue?
Need some help. All the garages have different answers.
Check for vacuum leaks
Yu do great videos!! Just what I needed.