car sounds wierd at 68mph and over. - 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 11-20-2007, 03:34 PM   #1
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Default car sounds wierd at 68mph and over.

my car sounds wierd at highway speeds,68mph and over,my car sounds like if im steping on it and im not.like if im playing with the throttle constntly.iim begining to think that is a missfire,but it doesnt happen at low rpm or low speeds,and its not throwing no codes at all,i havent beggin to check nothing,because i wanted to see what you guys would tell me!!! :(
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Old 11-20-2007, 03:36 PM   #2
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What?
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Old 11-23-2007, 07:38 PM   #3
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I had that same problem....My mechanic fixed it for me but i didnt ask him what he did.....he changed to of my coils and changed my transmission mount...so try one of those
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Old 11-24-2007, 08:08 AM   #4
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I think he means it'* surging........
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Old 11-24-2007, 07:12 PM   #5
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well if i understand your question properly (which is very iffy) it sounds like it could be the computer. when mine went bad, it would ffeel like it was hitting a rev limiter - but at random RPMs. it also surged once in a while.
could it maybe also be a throttle position sensor?
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