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.

WTF is that hesitation!!!

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Old 06-30-2003, 03:35 PM
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It is turning out to be an EGR prob causing the low power climbing hills but the slight shudder is here to stay. I have driven a 95 Park Avenue Ultra today quite a bit and it does the same thing. Mine was keeping the EGR open under boost and blowing hot EGR gases through the supercharger. It'* supposed to close the valve but it wasn't closing. I bought a new valve to try. I will report the results.
Old 07-07-2003, 05:48 PM
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allmachtige - did you ever figure this one out?
Old 07-08-2003, 05:03 PM
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The car is going in next Weds. to be scanned and troubleshooted. I threw in the EGR idea and one of the mechanics said they will test the EGR and o2 sensor because if anything, the computer will throw a soft code of "Lean" or "Rich".
Old 10-09-2003, 10:33 PM
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hey Allmachtige, I realize this post is very old, did the shudder go away?
Old 10-09-2003, 10:57 PM
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my car does the same type of thing....between 45 and 60...its like the tcc tries to engage in D...cuz i will downshift to d and it doesnt do anythign it still shutters then i put it down to 2 the rpms go up and it stops...but i dont like drivin thtat high rpms wastes gas
Old 10-09-2003, 11:08 PM
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You know what, I found out what is causing the hesitation, but I dont know why!

Its whenever I turn on the ECC (electronic climate control)...new alternator and optima battery so I'm not sure whats up now...maybe my MSD wires took a crap.
Old 10-09-2003, 11:16 PM
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i just sent my msd coil back to jegs today cuz it went bad quick so they better replace it!!!
Old 10-09-2003, 11:58 PM
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Mach, I'd really like to see your plugs. It can tell alot, not just about ignition probs.
Old 10-10-2003, 12:06 AM
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I can take pics this weekend for ya Bill, but allow me to quickly describe.
1.) Small rubs that go a few mm into wire from not using wire holders for many months.
2.) One (maybe more) boot is visably bent from continuous improper installation.
3.) I dont think the stock wire holder on the front head is made to handle 8.5mm wires, I had to use some force to squish them in there...possible damage.

The end of my sad sad story.
Old 10-10-2003, 12:11 AM
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Kyle, your plugs will tell you if your suspicions are correct. Checking my plugs is what led me to my bad coils and alternator. Forensic science is great, ain't it?


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