Bandit's Surging/Poor Idle - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 11-09-2006, 09:31 AM   #1
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Default Bandit'* Surging/Poor Idle

Sitting in Bandit'* 94 SE at a light the car will all of a sudden dip down about 300 rpms then come right back and do this a few times.

Driving seems to be fine, idling out of gear appears good.

Plugs and wires a pretty new and not a suspect at this time.

I'm thinking it'* possibly a dirty sensor, where should he start?
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Old 11-09-2006, 09:42 AM   #2
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Let me clear it up just a bit

Its not at a idle its when sitting at a light or what not and i hold the brake or start to take off and give it a little gas it will chug/sputter and stuff.

Also im still having that Chugging.sputtering problem at speed when giving it a little gas to go up a hill.

I think its a TPS. Cuz it always seems to be around the same amount of throttle

*edit- The plugs and wires where done like 15K ago or so, NKG and AC delco wires.
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Old 11-09-2006, 09:59 AM   #3
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Is it possible to connect a DVM to the TPS, advance the TPS and watch for any abrupt changes in values?
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Old 11-09-2006, 10:00 AM   #4
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just to throw this out there..

my car would slow down, and lack power, when going up hill
when i changed my fuel pump, it went away.
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Old 11-09-2006, 10:03 AM   #5
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Quote:
Originally Posted by 94BonnieSE
just to throw this out there..

my car would slow down, and lack power, when going up hill
when i changed my fuel pump, it went away.
nope its not that try of problem, i have all the power of a 2.84 L27 bonne.. but just at certain throttle areas i have chugging / sputtering problems..
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Old 11-09-2006, 10:04 AM   #6
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Seems to me that Bandit needs to check his TPS.
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Old 11-09-2006, 10:07 AM   #7
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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
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Old 11-09-2006, 10:17 AM   #8
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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
Yes check the TPS.... It should operate smoothly with no dips or spikes

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Old 11-09-2006, 10:19 AM   #9
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Maybe that'* what'* wrong with mine also?
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Old 11-09-2006, 10:30 AM   #10
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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...

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