Hummer H3 Idle Problem, Stumbling, Dies at Idle- No Check Engine Light

Hummer H3 Idle Problem, Stumbling, Dies at Idle- No Check Engine Light

DIYer diagnosing 2006 Hummer H3 with an erratic idle and stumbles, almost dies when comes to a stop otherwise drives fine.

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Thomas EXOVCDS says:

Should it not have been running rich and take fuel away due to restricted
air flow?

Jeffrey Wilson says:

Matt, I have to thank you for this video. It was hilarious and provided a
much needed humour break at work today! I herded the apprentices at work
into the lunch room to watch the video. Thanks to you the theme for the
week at my shop is now “Get what’s in the way, out of the way” I figure
this will save me answering about 100 questions this week alone! 🙂 haha.
Good diag and info as always. The basics are often overlooked but can
really save you a lot of time and headaches if remembered to be checked
first :)

Wd Hewson says:

Thanks. Funny and informative.

I’m all for the accurate diagnostics, car tech or medical tech.

But I’m not so tough on the disassembly aspects of many videos. Sometimes
the attachment points and sequences of work are not apparent, even to a
thinker. The Japanese are particularly sublime about how some things come
apart. Even some electrical connectors have non-standard release clips.
Same for fuel lines. I even like to see how tight the pros “muscle” a
fastener as not all are torque wrench accessible.

But don’t let the “useless” critics get to you. Their primary objective is
to annoy you and get attention. Pretend they don’t exist, they get
frustrated and go away to pick on someone else.

Don’t take too long off………………………

Inland.Empire-Sanitation951 says:

nice video. haha i think if people cant even use common sense to take basic
things apart to get to what they need to get to, then they probly shouldnt
even be doing it anyways haha. I myself take pictures so i know what goes
where if i have to remove a lot of things.

jay7264 says:

I thought this video was great. YouTube how to open the hood

mike withers says:

Hummer with a happy low cost ending ! LOL.

JUDGERAMBO says:

Common sense isn’t so common. 

vanox Naser says:

Thanks for the great uploads! I just spent the whole afternoon watching all
your videos…Great job!

jarin wilson says:

What a smartass, we welcome you into the automotive community, you fit the
bill Matt, haha. Just don’t tell anyone that an Astro Van takes Astroglide
for trans fluid.

jaberwocky6669 says:

I’ve seen a far, far worse air filter off of a ’96 Chrysler Town & Country
LX-I. Every rib completely clogged with thick black gunk.

venture st. john says:

Lol. a little thin skinned but great vid

Steve Rob says:

That was a Humdinger Matt. Here’s some professional diagnostic
advice from a level 3 tech 4 unlicensed doityourselfer. Sitting in the
drivers seat with KOEO cold engine I always look at these pids first. –
IAT ECT-TPS-MAF and I assume you did the same but as usual you refused to
go step by step – I also came close to giving you a thumb’s down but I am
such a forgiving person plus its not often I see a hummer on YouTube. You
are the first person I have ever seen do a hummer on YouTube. Would I be
correct in assuming the TPS was at 6% KOEO and once you started up the
hummer you noticed the incorrect TPS % . As for no MIL that would depend
on the threshold programed into the PCM- I imagine if the throttle was
any more open the hummer would definitely expel a DTC. This women
drove from Denver Colorado to see you in Louisiana to check out her
hummer – Boy your good. You make fantastic vids Matt. :)

Darren Drennan says:

That was a clip by clip wouldn’t you say, lol

Daniel Olivas Perez says:

Matt! I love yours videos, I am waiting for new ones. Grettings From Spain

Kyle Whybrew says:

How many miles did that air filter run ?

dreamer2355 says:

A great and amusing video. Hopefully your customers don’t hear about how
much you despise their vehicles, lol. 

NewVersion2010 says:

OMG, I wish I lived there. Please sir, Can I pay for a Skype so I can get
some help over here? Thank God for you mannnn!

Dohn Joe says:

well… here’s a tip for you. if the client is a woman, the better her
appearance is, the worse her car is maintained. I’ve seen engines having
the oil older than her mother, only snakes and lizard were missing from
that sludge in the sump. I’ve seen engines over-overheated although the
dashboard was full of screaming-at-her red lights, but she had to go to her
daily facial first. now you show us an air filter that looks dirtier and
older than Moses’ beard after the journey in the desert. when the client
will come to pick up her H3, my advice is to pull tight a plastic bag over
her head and keep it that way for 40 seconds while telling her “see what
the problem was with your engine?” I hope you’ll sell her a $300 air filter
as a fix, otherwise she’ll not learn anything.

fivefortyeye540i says:

That’s must have been original air filter from manufacture.. Most wimmin
just drive until the weels fall off.. Just freeking clueless!

Jonathan Dean says:

Great videos,no more bolt by bolt sequences please! Can I ask you, looking
at long term fuel trim, when the car accelerates wouldn’t it be normal to
see a rise in the long term fuel trim figures? You seem to imply that a
rise in long term fuel trim is not normal during an acceleration? Thanks
for your help and great diagnostic videos.

Romeo Barrera says:

no the o2s would indicate a rich condition so the ecm pulls back on fuel
hense the fuel trim values ^-^, tac modules suck, the way the system works
is the computer reads the maf or map data (depending on loop status and
ambient conditions) and adds fuel to those values, the 02 sensors provide
fuel mix data during colsed loop and the ecm reacts by coming up with a
short term trim value, the ecm has a pre set trim value for open loop
operation, this helps for diagnosing o2s

benjamin mcclelland says:

I can’t stop laughing! 

frank hager says:

i think you made your point. yeah maybe bolt by bolt aint your thing. But
for me IDC about it anyways diagnosis is why im here, anybody can see what
needs to be removed.

Abderrahmane gouasmi says:

Hi! first, you should not bother yourself with “useless video”. We are
following your videos which means they are Ok; I have an explanation for
the absence of DTC light: less air from dirty filter implies less gas from
ECU, but the flow rate may not be enough to run the car as it should. so it
is not considered as a signiificant default especially when it does not
create pollution.

Tom N says:

Great job Matt, i prefer the technical aspect rather than bolt by bolt so
keep doing what you do dude.

cbobcbob100 says:

always great….can not make everyone happy…..but bolt by bolt may be
overkill but sometimes helpful with hidden bolts , etc,,,,,,, thanks
again…bob

nestor monsivais says:

awesome video matt

Milos Diklic says:

Your videos are excellent! Do not waste your nerves and time on those “bolt
by bolt” requests. Many regards from a fellow biochemist!

Kyle Whybrew says:

Oh lovely sarcasm, “get whats in the way out of the way”. I love it !!

dbrinkley5 says:

Lol. Bolt by bolt videos are for those that dont belong under a hood and
thus require no training or visuals on how to open a hood. 

paul miranda says:

i like your videos man

Kevin Stoker says:

Very helpful thanks!

JoeNunes345 says:

Great video. I particularly liked the tutorial on how to remove the top of
the air box.
I already knew how to open the hood.
From now on, i will be able to replace the air filter, on a Hummer H3,
anyway!!! 🙂 

scrimmy6969 says:

Excellent video sir. I was laughing from the beginning.

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