Strange sound and vibration... - 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 06-16-2007, 03:44 PM   #1
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Default Strange sound and vibration...

Okay, whenever I get into boost, the blower whine stutters or flutters, and my acceleration is turds....
changed plugs, wires, oil, air filter, and it'* still there.
the car is a 1993 Buick Park Ave Ultra 3.8 */C.
151k on the ticker
any help is appreciated...
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Old 06-16-2007, 11:49 PM   #2
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Default Strange sound and vibration...

Are you experiencing high RPM'* with bad acceleration? Also do you have a check engine light on?
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Old 06-16-2007, 11:51 PM   #3
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Obtain a scantool and check for KR (Knock retard). You most likely have cracks in your Exhaust manifolds causing KR which makes the car flutter when getting into the boost. Usually the flutter is the PCM dumping boost.
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Old 06-17-2007, 10:46 PM   #4
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Where do I get a scantool and how much are they?
I do work at a Gm dealership, so I'm thinking they might be able to help me out too.
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