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.

Bad idle, help

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Old 03-16-2011, 05:39 PM
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Default Bad idle, help

hi, GUYS MY 94 WOULD SHAKE ANS STALL CONSTANTLY, NO CHOKE OR PROPER IDLE, CHANGED FUEL RETURN LINE, RUNS OK CEPT, ON COLD START DOES SAME OLD THING UNTIL WARM THEN IDLES FINE, WHAT"* THE NEXT STEP? RELAY OR NEW FUEL PUMP? SES LIGHT CLEARS WHEN IT IDLES WELL,

THANKS PAULIE
Old 03-16-2011, 07:23 PM
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Pull the codes, https://www.gmforum.com/specifications-general-information-132/obd1-codes-retrieval-gm-1983-95-cars-trucks-%2A%2A-278820/

Have you cleaned the throttle body? Could be a sticking Idle air control.
Old 03-17-2011, 01:04 AM
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What kind of vehicle are we looking at here?
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Old 03-17-2011, 06:30 AM
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94 Bonne.
Old 03-17-2011, 06:34 AM
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ya, dirty IAC or just plugs and or wires cause cold start issues if left to long
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