Accelerates Out of Control
#1
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Location: Portland, OR
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Car: 89 IROC-Z
Engine: 350 TPI
Transmission: 700R4
Axle/Gears: 9 Bolt Borg-Warner/3.27
Accelerates Out of Control
I've had 2 Camaros do this to me so far. One being a 91 RS V6 and the other a 89 IROC-Z 350 TPI.
Each time I'm stopped and then as I accelerate the car keeps accelerating by it's self to the point where I have to turn the ignition off to stop it. After letting the car sit for a few minutes then starting it back up it runs fine. My IROC-Z has done it twice now and the RS only one time. Every time this has happened its been summer time and hot outside.
I was thinking maybe the cruise control? But then the CC on my IROC-Z was working then.
Anyone have this problem before? If so, what was causing it?
Any help would be greatly appreciated, Thanks!
Each time I'm stopped and then as I accelerate the car keeps accelerating by it's self to the point where I have to turn the ignition off to stop it. After letting the car sit for a few minutes then starting it back up it runs fine. My IROC-Z has done it twice now and the RS only one time. Every time this has happened its been summer time and hot outside.
I was thinking maybe the cruise control? But then the CC on my IROC-Z was working then.
Anyone have this problem before? If so, what was causing it?
Any help would be greatly appreciated, Thanks!
#2
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Car: 1988 GTA
Engine: LB9
Transmission: T5
Axle/Gears: 3.45
Re: Accelerates Out of Control
Some thing to check: Sticky throttle plate, defective TPS, interference on throttle linkage, bent cable, vacuum leak.
#6
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Car: 82 Z28
Engine: 383 SP EFI/ 4150 TB
Transmission: T400
Axle/Gears: QP 9" 3.73
Re: Accelerates Out of Control
If the TB is worn , the engine vac will pull on the butterflies when the throttle is released and will jam them against the bore in a open position.
As soon as you kill the engine , there is no vac so the butterflies close properly
Typically tapping the pedal when it occurs will close them
#7
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Car: 89 IROC-Z
Engine: 350 TPI
Transmission: 700R4
Axle/Gears: 9 Bolt Borg-Warner/3.27
Re: Accelerates Out of Control
If the TB is worn , the engine vac will pull on the butterflies when the throttle is released and will jam them against the bore in a open position.
As soon as you kill the engine , there is no vac so the butterflies close properly
Typically tapping the pedal when it occurs will close them
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#8
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Location: Delaware
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Car: 92 Firebird, 91 Trans Am
Engine: L31 with HSR, LB9
Transmission: 700R4, 700R4
Axle/Gears: '99 10 bolt 3.90, '01 10 bolt 3.42
Re: Accelerates Out of Control
I had a similar problem with a BBK 52MM, I added two stronger throttle return springs and its been better since.
#9
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Car: 91 Convertible
Engine: Stock 305
Transmission: Auto
Axle/Gears: 3.42
Re: Accelerates Out of Control
I had my accelerator stay stuck at WOT going down the road and that scared the crap out of me. I turned it off, coast it to a safe place and it was the TVS cable somehow interfered. I dont remember exactly but the part it slides in the clip area got stuck. I was able to later adjust it.
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