02-08-2009, 04:00 PM
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Hummer Guru
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Join Date: Dec 2005
Location: In a FREE U.S.A. where Marxism, Socialism & Communism is not allowed !
Posts: 5,485
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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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