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

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Old 11-17-05, 10:21 AM
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jumping idle

When my car is warm it idles at 1700 rpm or it will idle at 700-1100rpm jumping on the tach. When my car idled high I was to try the idle screw to reduce it, but now it bounces. I did not touch the idle srew and set it to low. Please help Eric
Old 11-17-05, 12:10 PM
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Start by making sure your TPS is set correctly, then set your idle according to the FSM.
Old 11-17-05, 01:11 PM
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what is a TPS, FSM?
Old 11-17-05, 02:42 PM
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TPS=Throttle Position Sensor, one of the main determinants of engine idle. Has to be adjusted to within spec before you will get a decent idle.

FSM=Factory Service Manual; in the "Fuel" section of the FSM you can read up on how to set and adjust the TPS, how to set idle speed and lots of other stuff you're gonna have to do.

FSM's can be found on line. Look in the FAQ section of this forum....
Old 11-17-05, 04:56 PM
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Old 11-17-05, 05:00 PM
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what do you mean by bounces?
Old 11-17-05, 06:22 PM
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it flutters between 1700-1000 rpms, bounces. I noticed when I was adjusting the idle screw I could olny get it to idle between 2000 rpms and this bouncing, fluttering thing. It would never idle normal no matter how adjust it. Can anyone please help.
Old 11-17-05, 06:42 PM
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yea kinda the same with my car it just goes around 800-700 when warp n drops a lil n goes back up it never stays in one spot
Old 11-17-05, 06:49 PM
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o forgot to say when its warm it does that sometimes it kinda sounds like its gonna stall.....
Old 11-17-05, 07:26 PM
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check your TPS and look for any vacuum hoses that are split or have come off.
Old 11-17-05, 08:14 PM
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will try
Old 11-17-05, 09:40 PM
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Old 11-17-05, 10:15 PM
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yeha mine does that once in a while when it warming up but i just tap the gas and thats it it's over and done with so? lol
Old 11-17-05, 10:56 PM
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i like the bounce
Old 11-17-05, 11:48 PM
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i have the same crazyness going on right now, i hate it.
Old 11-17-05, 11:57 PM
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does it cause any problems? if not i'd like to "break" mine so it will do that. (purely for show, no performance thoughts in mind)
Old 11-19-05, 01:38 AM
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what do u mean tps?
Old 11-19-05, 01:50 AM
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i mean tps where is it?
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