98 Bonne Slugish after warm up - Page 2 - 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 05-07-2010, 12:38 PM   #11
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We did a scan while siting and driving. But I am thinking capture the driving data and see whats up. I think your right another scan and maybe something was missed.
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Old 05-07-2010, 12:41 PM   #12
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Make sure your scanning enhanced codes, knock retard, check the torque converter lock up, things like that.
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Old 05-07-2010, 12:46 PM   #13
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Enhanced codes. Cool I will make sure the Medford crew is aware of that as I never even heard of that but makes sense. Good call.
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Old 05-15-2010, 11:00 PM   #14
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I started looking at this again and found the rubber vacuum fitting off the throttle body had a leak and was cracked. This is the one that also hooks up to the fuel pressure regulator. I did a temp fix with a T and hose till the GM replacement comes in next week Monday. We shall see in a day or 2 if that was the culprit.
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Old 05-16-2010, 12:34 AM   #15
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Any vacuum leak, no mater how small is going to be a problem.
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Old 05-16-2010, 09:34 AM   #16
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Quote:
Originally Posted by Danthurs View Post
Any vacuum leak, no mater how small is going to be a problem.
I agree Dan. The older our cars get, the more our vacuum system breaks down. Those little rubber connectors get hot, cold, hot, cold and break down. Even a minute vacuum leak can cause problems. Thankfully, most of our vacuum related things are located in the engine bay for easy accessibility.
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