Engine Surges - 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 09-28-2010, 09:37 PM   #1
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Default Engine Surges

97 Bonneville SE 3800. 265,000 KMS
New air and fuel filters.
Car will run fine up to 150km hr if you gradually throttle it there.
If you go wide open at any speed engine starts to surge at about 4000 rpm right up to 5500
Surging stops if I back off throttle a littleand then speed will increase.
Have not pulled plugs yet but will put in a set of AC platinums on the weekend.
Any sugestions on what else may be amiss?

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Martin
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Old 09-29-2010, 07:12 AM   #2
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A full tuneup does seem in order. While doing that, with the engine running, check all your vacuum lines for leaks.

Moved to 92-97 section for better visibility.
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