Idle problem
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Supreme Member
iTrader: (1)
Joined: Apr 2005
Posts: 1,165
Likes: 1
From: Valdosta, GA
Car: 1991 Trans Am GTA
Engine: L98(5.7 L TPI)
Transmission: 700r4(A4)
Axle/Gears: G80 RPO, 3:23s, Auburn Racer's Diff
Idle problem
1991 GTA
350 TPI
Automatic
So, for the past couple of months, my car has had idle problems. Usually it starts and runs fine. On the morning commute it isn't too bad. On the way home, however, it idles very poorly. It's almost like the engine is going to putter out and then it surges to stop itself from doing so. A couple of times, the RPMs did drop to low and I had to restart the car. When I get on the gas, the problem seems to go away, until it gets to idle RPMs again.
I had a similar problem on another vehicle of mine (which really reved out of control) and that turned out to be the idle control valve.
Any ideas on what the problem is?
Thanks!
Bill
350 TPI
Automatic
So, for the past couple of months, my car has had idle problems. Usually it starts and runs fine. On the morning commute it isn't too bad. On the way home, however, it idles very poorly. It's almost like the engine is going to putter out and then it surges to stop itself from doing so. A couple of times, the RPMs did drop to low and I had to restart the car. When I get on the gas, the problem seems to go away, until it gets to idle RPMs again.
I had a similar problem on another vehicle of mine (which really reved out of control) and that turned out to be the idle control valve.
Any ideas on what the problem is?
Thanks!
Bill
Senior Member
Joined: Nov 2011
Posts: 507
Likes: 1
From: Charlotte, NC
Car: 1988 IROC-Z Camaro, 1981 Trans Am
Engine: 350 TPI, 301 N/A
Transmission: 700r4, 350thm
Re: Idle problem
lol, but i would think IACV first, after that check i think vacc leaks, air filter(s), fuel filter would probably be my other first checks.
Thread Starter
Supreme Member
iTrader: (1)
Joined: Apr 2005
Posts: 1,165
Likes: 1
From: Valdosta, GA
Car: 1991 Trans Am GTA
Engine: L98(5.7 L TPI)
Transmission: 700r4(A4)
Axle/Gears: G80 RPO, 3:23s, Auburn Racer's Diff
Re: Idle problem
what's IACV? idle control valve?
Member
Joined: Aug 2003
Posts: 482
Likes: 0
From: Chesapeake, VA
Car: 1991 Formula Firebird
Engine: L98 with headers/exhaust
Transmission: 700R4
Axle/Gears: 3.23 10-bolt
Re: Idle problem
Mine is doing the same thing and I thought it might be the ignition module going out. Free bump for more input...
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