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02-03-2009, 04:18 PM
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Hummer Guru
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Re: 07 runs bad when at red light
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Originally Posted by HummBebe
You are such a goofball 
Try some injector cleaner?
Mine has always idled low/little rough....but I like it that way
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Doesn't look anything like me...!!! and I have a question BEBE, why do you like it rough ?!!!!!!!!!!!!!
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Last edited by RubHer Yellow Ducky : 02-03-2009 at 04:26 PM.
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02-03-2009, 04:25 PM
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Hummer Guru
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Re: 07 runs bad when at red light
as i was saying earlier...both of mine idol correctly...you can try a fuel additive or injection cleaner, change the fuel filter, check for loose connections to the plugs, burn a tank of premium and if all of that fails go to the dealer and have the mechcanic take a ride with you...first off go to StarBucks and buy Him a large latte and a muffin then hit a bunch of red lights...take a mechcanic, not the service writer...and by the way, settle on only one dealers and make sure you bring your REGULAR Service Writer (always use the same one) a bottle of WINE every June and just before Christmas...
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History, be it in 1 Year, 10 Years, a Hundred Years or One Thousand, will show that those people who voted for John McCain in the United States Presidental Election of 2008 were true patriots...
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02-04-2009, 06:55 PM
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Hummer Veteran
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Join Date: May 2006
Location: Argyle
Posts: 28
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Re: 07 runs bad when at red light
Thanks for the info, I do keep up with good mantanance on the truck but this has me stumped. The rough running seems to be after warmup and has progressivly gotten wrose over time. I know the I5 has a little vibration but not this much. I'll keep posting what I find.
What is the correct RPM at idle?
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Brad
2007 Lux w/adventure
White and Ebony
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02-05-2009, 02:18 AM
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Re: 07 runs bad when at red light
it should be in the book...
mine's lost !
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REMEMBER
History, be it in 1 Year, 10 Years, a Hundred Years or One Thousand, will show that those people who voted for John McCain in the United States Presidental Election of 2008 were true patriots...
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02-06-2009, 12:54 AM
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Hummer Authority
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Join Date: Sep 2003
Location: Canada
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Re: 07 runs bad when at red light
I would check the camshaft position solenoid. If you can rotate it without removing the hold down bolt it needs to be replaced. Also if you remove it and any of the screens are missing where the oil feed holes are, again it needs to be replaced. These two problems can cause idle issues without setting codes but usually do set a code
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02-06-2009, 05:05 PM
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Hummer Veteran
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Join Date: Nov 2006
Posts: 172
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Re: 07 runs bad when at red light
If it only runs rough at idle after it warms up it probably is going to need a head. Even a few 07's have had bad heads. Not nearly as bad as early 06's though. Has your check engine light came on?
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02-08-2009, 01:44 PM
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Hummer Veteran
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Join Date: May 2006
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Re: 07 runs bad when at red light
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Originally Posted by pdsq99f4
If it only runs rough at idle after it warms up it probably is going to need a head. Even a few 07's have had bad heads. Not nearly as bad as early 06's though. Has your check engine light came on?
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Never had the light come on. From what I read about the head, my first thought would be to change it. I am going to try and get it back in the shop next week. Buy this time I am taking it to a different shop and see what they come up with.
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Brad
2007 Lux w/adventure
White and Ebony
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02-08-2009, 04:00 PM
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Hummer Guru
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Re: 07 runs bad when at red light
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Originally Posted by Webster1
Thanks for the info, I do keep up with good mantanance on the truck but this has me stumped. The rough running seems to be after warmup and has progressivly gotten wrose over time. I know the I5 has a little vibration but not this much. I'll keep posting what I find.
What is the correct RPM at idle?
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Checking the TACK mine seems to be in the 600 range
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History, be it in 1 Year, 10 Years, a Hundred Years or One Thousand, will show that those people who voted for John McCain in the United States Presidental Election of 2008 were true patriots...
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02-08-2009, 10:00 PM
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Re: 07 runs bad when at red light
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Originally Posted by RubHer Yellow Ducky
Checking the TACK mine seems to be in the 600 range
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X2 since new its been around 600 nice and steady 
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