Weird idle problem
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Supreme Member
Joined: Aug 2001
Posts: 1,337
Likes: 26
From: Wesley Chapel, Florida
Car: 1991 Camaro Z28
Engine: Dart SHP 406ci T88 turbo
Transmission: T56
Axle/Gears: QP 35 spline Ford 9" 3.50 gears
Weird idle problem
After a while of driving around town, my idle shot up to 1500 rpm for no reason. I got no SES light or nothing. I replaced the IAC motor and everything was fine but then again after driving around town in stop and go traffic, the same problem. The idle all of a sudden jumps up to 1500-2000rpm. What the heck is going on? What other sensors dictate exactly what tells this idle motor to open up so much? I temporarily put a piece of duct tape over the IAC intake hole on the TB to keep the idle around 750 in traffic. The engine is a 305 TPI (conversion) SD system.
Last edited by pwdbychevy; Mar 19, 2004 at 10:26 AM.
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Joined: Feb 2000
Posts: 7,015
Likes: 2
From: Schererville , IN
Car: 91 GTA, 91 Formula, 89 TTA
Engine: all 225+ RWHP
Transmission: all OD
Axle/Gears: Always the good ones
Check the TB and IAC passages fopr being clean and open...
Have u set the IAC per the article on this site?
If not do that next.....
Also u had to do some ecm repinning i take it? Double and triple check what u repinned and verify all connections at ecm as well as the grds on the back of the cyl head
later
Jeremy
Have u set the IAC per the article on this site?
If not do that next.....
Also u had to do some ecm repinning i take it? Double and triple check what u repinned and verify all connections at ecm as well as the grds on the back of the cyl head
later
Jeremy
Thread Starter
Supreme Member
Joined: Aug 2001
Posts: 1,337
Likes: 26
From: Wesley Chapel, Florida
Car: 1991 Camaro Z28
Engine: Dart SHP 406ci T88 turbo
Transmission: T56
Axle/Gears: QP 35 spline Ford 9" 3.50 gears
Originally posted by 3.8TransAM
Check the TB and IAC passages fopr being clean and open...
Have u set the IAC per the article on this site?
If not do that next.....
Also u had to do some ecm repinning i take it? Double and triple check what u repinned and verify all connections at ecm as well as the grds on the back of the cyl head
later
Jeremy
Check the TB and IAC passages fopr being clean and open...
Have u set the IAC per the article on this site?
If not do that next.....
Also u had to do some ecm repinning i take it? Double and triple check what u repinned and verify all connections at ecm as well as the grds on the back of the cyl head
later
Jeremy
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