Lowering the idle...... - 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 04-11-2004, 10:37 PM   #1
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Default Lowering the idle......

Hi everyone....I am new to this site and have already found some answers to questions that I have...Cool site...I have a 1995 Bonneville SE and it idles a little to high....I would like to know how I can lower it just a tad....Thanks for your time.....Rags
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Old 04-11-2004, 10:39 PM   #2
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How high does it idle? When the engine first starts up, it is normal to idle a bit high.
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Old 04-11-2004, 10:44 PM   #3
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I have a 1994 also and it idles around 1.3 and this idles around 1.7 rpm..I just got the car and it seems it is too high because it jumps into gear hard....It also idles at a pace that when I have it in gear it will climb up the incline of my driveway....Can you help?...Thanks....Rags
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Old 04-11-2004, 11:18 PM   #4
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Does it only idle this way when you first start it? How about when it is warmed up?
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Old 04-11-2004, 11:57 PM   #5
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It runs at that RPM all the time.....
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Old 04-12-2004, 12:58 AM   #6
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Both of your cars are idling way too high. By about double. When was your last full tuneup, and have you ever had a scantool on your car?

Can you get one?
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Old 04-12-2004, 12:58 AM   #7
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Idle air control valve maybe?? Can anyone back this up?
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Old 04-12-2004, 01:07 AM   #8
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I think both of these cars would benefit from a TB cleaning. OFF the car, and very thorough. IAC valve is a possibility. Might want to clean the TB, lube the pivots, and the IAC itself.

I'd still like to know what idle rpm the PCM is requesting, and what RPM the PCM thinks is actually present.
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