Idle RPM - 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 12-23-2003, 06:06 PM   #1
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Default Idle RPM

what is a normal idle RPM for the Bonne, cold im about 1200-1400 or so hot roughly 880ish... w/ a tiny but of fluctuation in the gauge..... normal or no?
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Old 12-23-2003, 06:14 PM   #2
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I dont know what normal is but cold mine is about 1100-1200 and warmed up its about 900.
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Old 12-23-2003, 09:41 PM   #3
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You're both normal.
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Old 12-24-2003, 02:41 AM   #4
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well thats good to know
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Old 12-24-2003, 02:46 AM   #5
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I meant your cars. Not you.
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Old 12-24-2003, 02:54 AM   #6
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your ownage, sir
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Old 12-24-2003, 02:57 AM   #7
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Spank you very much!

On topic, it'* normal to see a variation from car to car just from the error of the Tach. Use a scantool to see what it really is. When I calibrated my rpm'* on my Gtech, I used the scantool for reference. My Tach varies very little from the scantool, but I've heard of others that vary as much as 300 rpms from true at idle.
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Old 12-24-2003, 07:28 AM   #8
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That'* about what I see on mine. Cold start around 1100-1200 rpm. After its warmed up at idle around 600-800 rpm'*.
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Old 12-24-2003, 02:04 PM   #9
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Scantools are great. I can actually see the rpm that the PCM is 'requesting' and trying to maintain, as well as the rpm the engine is running at. This can be a big signal when troubleshooting a problem.
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