High Idle When Starting, Cold Temperatures - Page 3 - 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 01-06-2008, 04:02 PM   #21
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But what is the normal RPM at idle?
Mine is at 1000/1100 RPM when warm. It started after I got the new re-built tranny
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Old 01-06-2008, 04:23 PM   #22
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My normal idle is like 600ish rpms?
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Old 01-06-2008, 07:55 PM   #23
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And where is the MAP sensor?
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Old 01-06-2008, 09:21 PM   #24
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on the left side of the UIM, just in front of the alternator, behind the coil pack. Only sensor on the top right there.
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Old 01-06-2008, 10:56 PM   #25
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Gotcha - that is not far from the PCV valve, right?
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Old 01-06-2008, 11:39 PM   #26
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It was the MAP? Fixed? Or...

I read this thread, thought I saw something about a TPS, reread, and can't find it....

anyways, I was going to suggest TPS maladjustment. The problem you're having (or have been having) is the exact problem that I had with my 89 LE, the original reason that brought me to this club looking for help. Turned out to be the NEW TPS I had bought was reporting the throttle being about 20% open at all times, blade movement changed the reading absolutely none. After about 3 months of HELL trying to figure out the problem, I ended up putting back in the original TPS (I had a feeling I should keep it), adjusted it correctly, and the problem never came back.

My entire point is... if you DID replace the TPS, there is a good chance that the NEW one is bad, or that its just not adjusted right. (Not sure if the L36 has an adjustable TPS like the LN3)
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Old 01-07-2008, 01:26 AM   #27
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The MAP sensor is that little electronic thing above the PCV valve.

Edit - Here'* the link.
http://www.alldatadiy.com/alldata/AF...67131/34857542
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Old 01-07-2008, 08:32 AM   #28
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The L356 does not have an adjustable TPS...
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Old 01-07-2008, 12:29 PM   #29
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I am pretty sure vital49 means L36 and not L356.
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Old 01-07-2008, 01:40 PM   #30
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Whooops! Ya.
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