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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 11-04-2004, 05:22 PM   #1
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Default backfires 92 bonneville

got a 92 bonneville giving me a severe headache.
2 major problems with her.

1- speedometer goes berzerk every once in a while

2- engine backfires badly or even stalls when hot

please any help with these problems would be appreciated

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Old 11-05-2004, 12:54 PM   #2
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Default Re: backfires 92 bonneville

Has the SEL(Service Engine Soon) light ever come on? You might have some codes stored in the computer that might tell us something.

When my "Speedometer went Bezerk" once. It was due to the fact that my VSS(Vehicle Speed Sensor) failed. Cruise Control and the Transmision O/D was also effected.

I'm not sure what is causing your engine to stall/backfire when hot. But I would get this car scanned for codes.
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Old 11-05-2004, 01:00 PM   #3
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Have you had a tune-up recently? Is there a vacuum leak?
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