WTF: why won't the idle adjust?
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Shelby Tuner & FC badass
Joined: Apr 2002
Posts: 1,101
Likes: 0
From: Seminole, Florida
WTF: why won't the idle adjust?
I need some help. My buddy asked me to help him last night, He has the 88 GXL Auto-slowmatic.
The idle was 2500 and surging. I fixed the surging, but could only get the idle down to 2000.
I followed the FSM for setting the idle, but the darn air ratio screw in the manifold does absolutly nothing. I also had to screw it all the way down, just to keep it from surging.
Is this a classic TPS went bad?
I read a post about disconnecting the TPS drive it around the block and reconnect it and that works?
I tried to adjust the TPS without a light set, nothing happened, so I put it back where it was.
The idle was 2500 and surging. I fixed the surging, but could only get the idle down to 2000.
I followed the FSM for setting the idle, but the darn air ratio screw in the manifold does absolutly nothing. I also had to screw it all the way down, just to keep it from surging.
Is this a classic TPS went bad?
I read a post about disconnecting the TPS drive it around the block and reconnect it and that works?
I tried to adjust the TPS without a light set, nothing happened, so I put it back where it was.
Joined: Feb 2001
Posts: 29,798
Likes: 128
From: London, Ontario, Canada
He has a vacuum leak and/or a bad TPS. Adjust the TPS. If that doesn't solve the problem, look for a vacuum leak.
Use an ohmmeter to adjust the TPS, don't waste your time with test lights.
Use an ohmmeter to adjust the TPS, don't waste your time with test lights.
Opinions are like........
Joined: Dec 2001
Posts: 879
Likes: 1
From: Prov RI
Download the fuel/emissions NA chapter(4a) of the FSM. It has detailed and easy to follow instructions on curing a high idle.
Things to look at: vacuum leak, cold start thingy, bacv and solenoid, tps, throttle cable......
Things to look at: vacuum leak, cold start thingy, bacv and solenoid, tps, throttle cable......
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