Bandit's Surging/Poor Idle - Page 3 - 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 11-10-2006, 10:21 AM   #21
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Does anyone think a vacuum leak could cause this? I know it isn't constant, but the vacuum leak doesn't have to leak all the time. Would seem strange that it is only at a stop/ish when it would leak but that is when you are on the brakes. (brake booster )

just a thought
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Old 11-10-2006, 10:30 AM   #22
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I felt it.. doesn't seem like a vacuum leak. Although we shouldn't rule it out.

Ryan.. you changed most of the lines one of the times you were over?
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Old 11-10-2006, 10:37 AM   #23
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Quote:
Originally Posted by BillBoost37
I felt it.. doesn't seem like a vacuum leak. Although we shouldn't rule it out.

Ryan.. you changed most of the lines one of the times you were over?
i changed some.. like 2 or 3...
I was having trouble finding the right sized lines while i was there.
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Old 11-10-2006, 11:14 PM   #24
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More videos


lesson to the exhaust to here the problem.



Watch the Tac, when you see it first drop right when it starts i was holding it

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Old 11-11-2006, 01:42 PM   #25
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I see the SES light.... what are the codes?

Being a 94 you will have the P0--- and P1--- codes

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Old 11-11-2006, 01:57 PM   #26
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Quote:
Originally Posted by jr's3800
I see the SES light.... what are the codes?

Being a 94 you will have the P0--- and P1--- codes
Yeah thats just my EGR code problem iv been having. it sticks , i just need to clean it. been lazy
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Old 11-11-2006, 05:37 PM   #27
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Hey Bandit, guess when the EGR valve opens under normal driving conditions? I'll give you three guesses.
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Old 11-11-2006, 05:39 PM   #28
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Quote:
Originally Posted by motorhead
Hey Bandit, guess when the EGR valve opens under normal driving conditions? I'll give you three guesses.
at idle? at slowing down? at take off?
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Old 11-11-2006, 05:46 PM   #29
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well, this sounds like the same exact thing that my car did last year. It was stalling, sputtering, chugging, surging, stalling at stoplights, hesitating, etc. I replaced the TPS...no go, still did it. In fact the TPS I installed was bad and I put back the one that was originally in the car, Which is the one I still use today. It was the MAF sensor, 100%. I was getting ALL KINDS of codes..., one for the TPS which was not bad, the IAT (not bad), something about the EGR (not bad), and then code 34 for the MAF. I ran down to my local yard, grabbed the MAF off another LN3, installed, and EVERY code dissappeared. Our engines are very similar, I suggest you try that. I am not gonna say go buy a new one...because well they are expensive as hell, so just go grab one and see if that fixes it, that way if it isn't the problem you aren't out $200 some dollars.

even the dealer told me it was the TPS...hah, go figure.

Good luck ryan!
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Old 11-11-2006, 05:46 PM   #30
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Just above idle, part throttle, normal acceleration. Right when you are having your trouble. Fix the EGR issue and I'll bet the stumble will be gone.

BTW, EGR opperation is not usually allowed by the PCM until the engine is warm, so if this is only happening on a warm engine then that would kind of tell me that it is related to your EGR fault.

Unplug the EGR valve and drive it, does the problem go away?
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