2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

Clutch in = Idle Surges

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Old May 30, 2005 | 01:24 PM
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Kouta's Avatar
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Clutch in = Idle Surges

Alright so I finally stabalized the idle on my t2 (stripped/emissions removed)
Its will idle just fine in neutral/clutch up, but once i press down on the clutch it will start to surge, about 500rpm worth so like from 800 to about 1300 rpm just sit there as if someone was just tapping the gas consistantly at the same interval.
My narrow TPS is already set. There some vaccum line that i could possibly check?
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Old May 30, 2005 | 02:28 PM
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Check your BAC adjustment and idle mixture.
Also check your TPS for any dead spots. You may have it set, but it could have a dead spot.

Also are you setting the TPS after the car has been fully warmed up to operating temp?
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Old May 30, 2005 | 02:38 PM
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Originally Posted by The Spyder
Check your BAC adjustment and idle mixture.
Also check your TPS for any dead spots. You may have it set, but it could have a dead spot.

Also are you setting the TPS after the car has been fully warmed up to operating temp?
Yeah TPS checked and adjusted fully warmed up (dam ic), and its in spec just fine.
Going to check the bac and idle thing now... after i read up on how to do that.
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Old May 30, 2005 | 03:49 PM
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I can't find the idle mixture screw and bac adjustment stuff... its supposed to be by the intake manifold right?
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Old May 30, 2005 | 03:55 PM
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yes above the turbo...and above the nipples
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Old Jun 3, 2005 | 07:53 PM
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I dont have one of those. So I just need to adjust the idle screw on the throttle body. Is there and kind of vaccuum line from the transmission that might be the culprit, i found something that kinda looked like it on the drivers side somewhat under the IC. I put my finger over it and it still surged, maybe there is more than i thought to it though.
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Old Jun 5, 2005 | 04:34 PM
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Everything is in the timing...
But yeah, reset the timing and now its gone. Thanks for all the input everyone
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