Idle problems - 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 04-07-2005, 04:04 PM   #1
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Default Idle problems

I've searched the forums and haven't found a problem quite like mine, so I'll throw this out there.

I've got a 1992 SSE, no mods, and I'm having problems at idle. The RPM'* will cycle up and down from roughly 900 down to around 600. However, the problem isn't consistent. It will idle pretty smooth sometimes, and others it will start the cycling again. Occasionally, usually while driving slowly (ie, parking lots, intersections, etc) it will die completely. I've got no ideas on what may be causing it. My bonnie has 180,000 miles on it, and as far as I know, everything is original except the water pump. Does anyone have any ideas?
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Old 04-07-2005, 04:22 PM   #2
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Clean your TB, paying close attention to the IAC passage (remove the TB to do this).

Gently clean the MAF sensor wires with rubbing alcohol and a Q-tip.

Replace your O2 sensor if you don't know how old it is. They typically start getting lazy around 50k miles.
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