automatic RPM kick down when cold on Series II - 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 01-08-2004, 08:46 PM   #11
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If you had a scan tool, you could view the idle rpm request, and see where the computer wants your car idling at.
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Old 01-08-2004, 10:45 PM   #12
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I believe the computer is supposed to run in Open Loop status for the first 10-30 seconds and run a rich condition until the O2 sensor can start sending data to the PCM. It will request a higher idle until the O2 sensor starts feeding info, and computer goes into Closed Loop status, and take over fuel monitoring and timing etc.
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