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.

Bandit's Surging/Poor Idle

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Old 11-13-2006, 03:01 PM
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Originally Posted by Maymybonneliveforever
I sear to God, the way everyone ignores me, I must be Canadian.

Sorry....did you say something?

Seriously, though. Sorry....what did I miss.
Old 11-13-2006, 05:57 PM
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if you can swap in a known good MAF i would try that. ive had a similar problem and it was the maf, cleaning the old one didnt help but replacing it fixed it
Old 11-13-2006, 07:54 PM
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Originally Posted by NERV
if you can swap in a known good MAF i would try that. ive had a similar problem and it was the maf, cleaning the old one didnt help but replacing it fixed it
thats what I have been saying all along maybe he'll listen to you.
Old 11-13-2006, 08:38 PM
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Originally Posted by wjcollier07
Originally Posted by NERV
if you can swap in a known good MAF i would try that. ive had a similar problem and it was the maf, cleaning the old one didnt help but replacing it fixed it
thats what I have been saying all along maybe he'll listen to you.

Again.....


Originally Posted by bandit
Originally Posted by wjcollier07

Ryan: you said you did the MAF test...did you REPLACE it?
Originally Posted by bandit
Ok did that test with the MAF.

Still having the same problem. :( :?
Old 11-13-2006, 08:39 PM
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Originally Posted by Archon
Ryan, has the O2 been swapped out recently? It looks like the IAC is trying to keep up, but I'm not as sure about the O2 variations. Try the TPS, and see what that does first.
Yup the O2 is New, has like 5 or 8K on it now.. its a AC delco
Old 11-13-2006, 08:41 PM
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Well, I'm not trying to sound like a broken record, but you never answered my last question...
Old 11-13-2006, 08:46 PM
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Originally Posted by motorhead
Well, I'm not trying to sound like a broken record, but you never answered my last question...
Originally Posted by bandit
Ok cleaned the EGR, Checked for leaks.

Every thing seems ok far as EGR

But still having the problem :?
And the code hasn't come back, so i know that not the problem.

From all the data and what other people think, its sounds like a TPS.

Also my dads car is having kinda the same problem at the idle to start.. like mine.
He thinks its his TPS also.


Im going to try to get a TPS "cheap" and put it in and see what happens
Old 11-13-2006, 09:11 PM
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I know you said you cleaned it, but you didn't say if you drove the car with it unplugged. I'm not saying it is defiantly EGR related, but if it is, the PCM may not be picking up on the fault if the EGR is still operating within the "window" that the PCM wants to see, so it may not set the code.

The more you describe it, the less it sounds like EGR. The thing is, it is such an easy test that I'm surprised you haven't tried it yet?

From what I interpreted of the graphs you posted, the TPS looked like it was working fine when the RPMs were low? But I'm not familiar with the scan tool you used or what "you" were doing when these graphs were recorded...your "actual" throttle position compared to what the graph says.

If the TPS values on the graph match what you were doing with the accelerator pedal, then I would say that your TPS is working just fine.

This is a very technical subject with the introduction of the data you have access to, which is the reason why I was asking for clarification on the EGR "unplugging" test that I mentioned.
Old 11-13-2006, 09:19 PM
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Originally Posted by motorhead
I know you said you cleaned it, but you didn't say if you drove the car with it unplugged. I'm not saying it is defiantly EGR related, but if it is, the PCM may not be picking up on the fault if the EGR is still operating within the "window" that the PCM wants to see, so it may not set the code.

The more you describe it, the less it sounds like EGR. The thing is, it is such an easy test that I'm surprised you haven't tried it yet?

From what I interpreted of the graphs you posted, the TPS looked like it was working fine when the RPMs were low? But I'm not familiar with the scan tool you used or what "you" were doing when these graphs were recorded...your "actual" throttle position compared to what the graph says.

If the TPS values on the graph match what you were doing with the accelerator pedal, then I would say that your TPS is working just fine.

This is a very technical subject with the introduction of the data you have access to, which is the reason why I was asking for clarification on the EGR "unplugging" test that I mentioned.
If you read the Thread/my post about the problem and the Charts you will see what i was doing.

The problem has always been and still is...

1: Stopped, Holding the brake, Give a Just a bit of gas, and it chuggles/sputters while holding the gas steady.

2: At Speed and while the TR converter is locked around 48-55 you can feel it the most because of where the RPMs are at. You hold the gas study or hold it a bit for going up a hill and ir will chug / sputter.


Far as the EGR, this problem has been happing way longer the the EGR Code, so im pretty sure it not related.
Old 11-13-2006, 09:31 PM
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Well fine then, don't do such a simple test as driving the car with the EGR valve electrical connector unplugged. I hope you can get the problem fixed.

I seriously do look forward to finding out what the cause of this is, not for the sake of who'* right and who'* wrong, I just realy would like to know as this one has truely stumped me.


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