small miss/Rough idle when warm.... - 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 12-09-2010, 09:17 PM   #11
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its more than likely one of the three basic needs..air fuel and spark..test your coils(could have gotten a bad one) check air filter check injectors and all wiring for them check feul pressure and MAF are always my starting points....Sounds like at an internittent point its losing one of the three they all need checked..I really reccomnd the hot and cold coil test as when my 97 had a bad coil it stumbled cold an ran fine warm..replaced it and problem solved..vaccum leaks cracked egr tube.lose wires check anything and everything..for visual evidence of a default or something that could cause one
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Old 12-10-2010, 11:39 AM   #12
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sweet thanks for the info!
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Old 12-11-2010, 11:59 AM   #13
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Hey crazy gunner...have you removed your plugs recently. Not sure if this is a indicator of the problem but my back plugs were all black, while the front plugs were all white. hmmmm
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