Bandit's Surging/Poor Idle - 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 11-09-2006, 10:34 AM   #11
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Quote:
Originally Posted by jr's3800
If the TPS goes bad the idle on these cars can get very screwy... The TPS is used for fuel calibration, Engine Load, as well as it being used as the Kickdown signal ( Falls into engine load )... If the TPS is not happy the shifts could be a bit off and quirky... I have seen a couple actually loose the kickdown signal.... Not pretty when crawling a hill with your foot on the floor and get no shift( manual downshifting comes into play )...

I'd say the best way to look at the TPS is with a scantool.... But a digital multimeter will work...
yes....

now that you say that...

i have seen sometimes it seems to take ALLOT more to get it to kick down.

I think we may know what my problem is. I am going to check this out when i get home.
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Old 11-09-2006, 10:43 AM   #12
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Quote:
Originally Posted by BillBoost37
Here'* the PDad link to adjusting.

Don't adjust it, only use the part of how to check the readings. Report back your findings..

http://www.bonnevilleclub.com/forum/...=22830&start=0
THe old L36 in my car did that, but only at certain rpm ranges, if I accelerated a little it would go away, I did the TPS trick and it was gone.
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Old 11-09-2006, 03:55 PM   #13
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Im going to toss this out there..
bad Voltage regulator? You say it does it when you apply the breaks? when there is a sudden demand on the electrical system?
Just an hunch
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Old 11-09-2006, 04:01 PM   #14
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Quote:
Originally Posted by SSEimatt93
Im going to toss this out there..
bad Voltage regulator? You say it does it when you apply the breaks? when there is a sudden demand on the electrical system?
Just an hunch
nope i must have wrote that one bad... lol

What i meant to say was when i Hold the brake and Tap the gas a little it does it..
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Old 11-09-2006, 07:25 PM   #15
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Uploading video now so you can see it.

At idle its at .40 and WOT its at 4.30

In the video you can see that it looks ok. or so i think you guys can tell me what you think. will be like 5min or so...

Edit* Video

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Old 11-10-2006, 09:02 AM   #16
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I also went out and took some videos of what happens, ill get them up later tonight.
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Old 11-10-2006, 09:21 AM   #17
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Any change in the multimeter when the "issue" occurs?
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Old 11-10-2006, 09:28 AM   #18
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Quote:
Originally Posted by BillBoost37
Any change in the multimeter when the "issue" occurs?
no, i didn't have it hooked up while driving, but i have video of the Tac and you can here the exhaust change also.

But now that you said that im going to do that when i get home, run some wire to there to inside the car and watch it while driving.
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Old 11-10-2006, 09:30 AM   #19
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The testing of the sensor was to know if you have a clear range from idle to wot, any drops or flucutations could help point out if the TPS is having issues. Seeing the problem on video w/o the TPS reading won't help from a standpoint of seeing what the TPS is doing when the issue occurs.

Please post the vids as it'll spark more ideas.. and see if you can watch the TPS when the issue is actually occuring.
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Old 11-10-2006, 09:33 AM   #20
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K will do.

Now the other weird thing is, is that it doesn't do it 100% of the time. But that could just be a fluke
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