How to fix rough idle on Hummer H3 with inline 3.5L

How to fix rough idle on Hummer H3 with inline 3.5L

[@williamcrosthwaite5000]

So glad I did this with minimal effort. Very informative. Remember to disconnect the battery before you begin. Good luck!!

[@marcanthony9963]

It works... Runs better then ever. What a relief with winter setting in. Thanks

[@hassanjassoma5809]

It is very nice and excellent what you are doing

[@JSELWA]

I clean them before colder months and always helps. My 07 has an AirAid cold air filter which I clean and re-use.

[@Ricovette]

Thank you so much for this upload! Thumbs up from me... Stay safe... Rico

[@MrViajero73]

Nice video thank you

[@EyeForKnowledge.]

I didn't disconnect my negative and everything is fine. It fixed the problem for the most part. But keep in mind this 5 cylinder motor is pretty well known for vibrating. It's normal.

[@HaVoC12UnLeasheD]

On my 2006 h3, Had a p0300 code, cleared and a day later got a p0305 both misfire codes (0300- random cyl) and 0305 (#5 cyl misfire) replaced with brand new air filter and cleaned maf sensor, run greats on idle, still stutters a little on stop lights but nothing major, will be cleaning the throttle body as most forums say it's the solution to that problem.

[@danielraymadden]

Good video my 07 h3 vibrates when idling I I put in lucas fuel treatments seemed to have more power. Still the truck vibrates with rough idle steering wheel feels like a vibrator. Also how do you keep your engine so clean it looks great. I dont know what engine cleaner to use. Do you clean often.

[@johnsally6304]

This does work!!

[@TheCaleb904]

Interesting. I wasn’t aware this was an issue for other owners as well. Whenever I turn my AC on the wheel will stop vibrating and is fine, but I will definitely give this a try thanks! Any one else get a rough start up occasionally when the engine is cold followed by a few seconds of rough idling with RPMS fluctuating a little? Sounds like the engine doesn’t get any air or fuel for a few seconds and it sounds like a dry chug, kind of sputter from the exhaust

[@maxwellssilverhammer]

Much better

[@blwnhmi]

Nice!

[@bluesteel5841]

Where you said that breather tube is!! Thats part of the pcv system. It has a 3/32 hole that gets caboned up and pluged..mine was completely blocked. I used a 3/32 drill bit with my hand to turn slowly and break loose..might check that to if your h3 is using oil.

[@mattcurry2866]

I'm really hoping this could solve my h3 problem.... You described the Hummer as "farting" at times... I tend to get this farting/ shudder imidiatlety after accelerating... Too really feel it I just hit the gas real quick while in park and let go.. The whole car shakes a little bit in what I would call a kickback or shudder...it's not worrisome but it's definitely annoying once you notice it is there.. Before trying this method I wanted to get your opinion on the symptoms I just laid out for you... Hopefully your still active.. I know this videos a couple of months old! Thanks!

[@mattcurry2866]

Forgot to mention.... 2010 h3 5cyl... 64,000 miles... (I don't drive a ton).... Thanks

[@Eastsidee817]

Did u figure it out? Mine has the same hesitation after bearly pressing on the gas and the rpm go past 2

[@ChiefWiseEagle]

@@Eastsidee817 did you get it fixed?

[@DraccoKnightblade]

when you did this, did you have to do a 're-learn' cycle after cleaning the throttle body? I keep hearing that, that is something that happens with GM's mainly after cleaning a TB. Let me know?

[@brianenergi3367]

No

[@7ThrillFishing]

DraccoKnightblade how do you do the re-learn?

[@brianenergi3367]

George Delgado Didn't dona re learn. disconnect negative battery cable before you begin. reconnect when finished, and you're good to go

[@ryanphillips1278]

nice

[@chaverria]

Is it still idling fine now later on?

[@marianavarro1396]

Gracias. Thanks

[@johnsally6304]

Also new air filter!

[@XxTournaquetxX]

These engines are notorious for vibrating at idle. Just adjust the idle RPM to 850 and you're good to go.

[@dcsmith7747]

What is the procedure for increasing the idle RPM?

[@danielraymadden]

Good video my 07 h3 vibrates when idling I I put in lucas fuel treatments seemed to have more power. Still the truck vibrates with rough idle steering wheel feels like a vibrator. Also how do you keep your engine so clean it looks great. I dont know what engine cleaner to use. Do you clean often.