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Discussion Starter #1
Hey there, new to this group. I have a question for you all. I have a 1983 Trans Am with a 1998 Chevy 350 and a 5 speed. My issue is if you are out driving and mash the pedal past half it goes full throttle. The only way to stop it is to kill the ignition. Once I have done this, turn the key and it will start up at normally idle no problem. I have lube the cable and all connections, checked butterflies. What else could this be? Other than this the works awesome. Thanks in advance.
 

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Has it always been like this, or is this a new problem that has come up? If always, I would say the mating between the 83's cable and the 98 throttle body is amiss.

If the problem is a new one, I would have an assistant work the gas pedal while you observe how the linkage on throttle body opens. You'll be checking for binding, mis routed cable, mechanical damage etc.
 

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Discussion Starter #3
Thanks for the reply. I bought the car last spring and it has been doing it since I bought it. I should have mentioned it has a 600 holley four barrel on it. With a Accell HEI distributor and an Eldebrock rpm performer intake. I don't seem any binding of the linkage or the cable slides very smoothly. I started it up today and the throttle pedal is very stiff when you first press it. Once you get it pass that it is free.
 

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If pedal is stiff, there is something wrong there. It should have smooth travel through it's entire range. Might want to pull cable end off carb and see if pedal action stays the same, or improves. Problem could be with the pedal itself.
 

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Discussion Starter #5
I have checked the operation of the pedal and it appears to be fluent. The cable also feels to be free and smooth. If it was the pedal sticking, why would it correct it by turning the ignition off and restarting? To me the stiffness in the first movement in the pedal feels like it has to overcome an extended position then it's good. But the sticking throttle seems to be only as if something in the carb causes the butterflies to suck wide open. I'm at a complete loss here.
 
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