Technical Tips > Engines - Carbies - Exhausts - Dissys

sticky acc. pedal.

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Vette Obsessed:

--- Quote ---Originally posted by Cameron 77C3
Was is it sticking before it was rebushed?  Supply as much as info as possible.  Why were the bushes replaced?

I would think twice about drilling any holes.


Cam
--- End quote ---


I wouldn't be drilling any holes.  I'd be fixing the vacuum issue (if that is the problem) before I started modifying things as a work around solution.

87Z51:
"has been suggested to me to drill a small hole in each of the butterflies"

Say goodbye to your idle.

What model C4? Different setups across the years.
How is the movement past idle?
have you driven any other C4s?
Early models seem relatively stiff ,
 most mechanics comment on how hard my '87 is
(with new cable and TB)
Could rework to get better leverage but may run out of WOT travel

Chromie:
I am going to take a guess here, but it is might be that the "MANUAL" idle position is incorrect. In other words the butterfly position in not correct. I recon his is fully closed instead of partly open.
I suggest the the manual throttle position be checked/reset and then the throttle position sensor be reset.
This should solve the problem.

vettewest:
Thanks for the feedback everyone.The throttle has been sticky ever since I bought this thing.I pulled the pedal to bits because I thought that was the problem.I took the acc. cable out and oiled it because I thought that was the problem.I had the throttle body bushed because I thought the shaft was binding.After doing these I still have a sticky acc.With the motor off you can easily open the throttle by hand (at the throttle body).It all feels good.Start the motor and the throttle becomes very hard to open,even by hand at the throttle body.The butterflies are not binding in the body.This is not just an "off idle" problem.You can be driving along and put a little pressure on the "go fast" pedal and it wont budge,put a little more pressure on and it lets go with obvious results.Everybody thinks your driving like a ratbag.All I want is a smooth pedal.I'm not keen on modifying anything without proven results.Fear not I won't be drilling,bending,bashing without a good reason.Is this a common problem ? My car is an '86.Soon to be on the market if it keeps giving me dramas.Anyone looking for a cheap conv.....Just joking,I'm determined to sort this out.....gw.

Chromie:
I think that what you need to do now is to compare your Corvette to someone else's and compare pedal assemblys (length and throw), cable drag, and throttle bodies. Both running and not running engines. This will confirm where the problem is and then comparing the other Corvette's parts to yours you will have a tangeable result of the exact problem. If it ends up being throttle body it will require adjustment using the Service Manual as this part of the throttle should never be touched (it does have an adjustment).

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