99 Bonneville starts, won't maintain idle - 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 09-26-2007, 12:34 PM   #11
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Yeah it was triggering the SES light if I switched the key forward just before ignition. They believe the injectors and MAF were the problem, they're test drivig it as I post this to confirm. The nice thing about the dealer is they usually find the problem but im looking at a $600+ bill. They said the pcm was losing communication with the MAS, which explains they the car was trying to run rich to stay running. Now to sell this car and get the firebird engine rebuilt!
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