Misfire under load 50 + mph - 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 06-23-2003, 11:54 AM   #1
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Default Misfire under load 50 + mph

Well my hi mile Bonne has a little blower knock in it, and on a side note the car has a bad loss of power climbing hills in 4th with TCC locked up. The more gas you give it, the more it stumbles and even in boost it won't pull a hill. Only when TCC is locked up though at 50+ MPH. Even at 75mph it won't climb hills without stumbling. Has anyone experienced the blower knock being picked up by the Knock sensor and making the computer pull timing? I haven't had time to confirm with the Tech 2 scanner that it is pulling timing, but it sure feels like it. What about a motor mount causing this?

I just called GM technical Assistance and they don't know anything.
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Old 06-23-2003, 02:04 PM   #2
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It the SC knocking at idle or at drive speeds.?
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Old 06-23-2003, 03:47 PM   #3
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Quote:
Originally Posted by Bassplayincrowe
It the SC knocking at idle or at drive speeds.?
Idle only I think.
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