rough idle - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 07-18-2005, 01:03 AM   #11
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Quote:
Originally Posted by 92se
im not retarded maf mass air flow sensor....and its not that
Nobody ever said you were retarded. I was busting on Kennginn for a nearly worthless post. And it very well could be your MAF sensor unless you've already cleaned it and ruled it out.
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Old 07-18-2005, 08:49 PM   #12
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thottle body and mass airflow sensor cleaned i found a main vaccum hose dry rotted so i replaced it but it doesnt do it as bad but it still kinda does it... ive got codes for my coolant sensors but i dont think that would do it
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Old 07-18-2005, 09:56 PM   #13
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Ok. You're on the right track if it'* cleared up a bit. With a clean MAF, TB, and fixed vacuum leak, you have two likely suspects:

1. Another vacuum leak.
2. A burnt exhaust valve due to the fact you have (most likely) an egr-less 92. Get a compression check. Both wet and dry. If they read the same, but one or two cylinders is low, you have a burnt valve.
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Old 07-19-2005, 12:20 AM   #14
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yea ive checked for more vaccums and it seems like i hear one by my fuel lines... is there ne vaccums over therE???? :?:
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Old 07-21-2005, 09:01 PM   #15
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Yes, there is a short vacuum hose that should go between the vacuum distribution tower on top of the TB to some sort of module that is on the fuel rail. This is a tricky one to replace because one end is 7/32" and the other is 5/32"
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Old 07-21-2005, 11:41 PM   #16
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Also check the vacuum lines from your charcoal cansister to motor. Mine were rotted and gone.
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