First off, I just recently replaced my stock throttle body and plenum with a 75mm Professional Products tb/plenum. The thing is, the gas pedal will get stuck slightly when I first press it. It gets annoying because I will buckle the car when I start off or sometimes almost stall out. Now when the engine is shut off the throttle body will move just fine. It opens up with out any resistance. This problem only happens with the engine on.

Current modifications are: Intake, tb/plenum, catted x-pipe.

 

Kinda had the same problem. Throttle would stick wide open and sometimes the cable wouldfall off. Its the little track that the throttle cable runs through. I zip tied mine up really tight and it solved the problem could look into that other wise dont know. . . .

 

wow... thats dangerous as hell. Apparently professonal products FTL!

 

The thing is it works fine when the engine is off. It only gets stuck when the engine is running. The best description is it'slike there is gum on the throttle body.

 

i had the same prob. with my truck... it went away after a while... but every now and then it does stick right at the beginning... i think it just needs to be broken in... idk though...

 

Tmas99 - Thats exactly what it does. The thing is, I bought this setup used with about 3k miles on it already.

 

Sounds scarey.I had a similar problem with a carb doin that when i was 17.Eventually the throttle got stuck wide open and before i knew it i was doin 80 towards a dangeruos intersection.I threw it into neutral and blew it up.Scared the crap outta me!!Good luck with that man,be careful.

 

I have the same TB/Plenum and mine did the same thing at first. The problem is when the engine running there is a vacuum holding the butterfly valve in the throttle body closed just enough that it is noticable. What you have to do is use the idle screw to adjust it so the valve in the TB is ever so slightly open when at idle, this eliminates the vacuum and the sticky throttle feeling. You want to turn this screw maybe 1/4 of a turn, probably even less.

 

Could you point me in the right direction of where this screw is and which way would I turn it? 1/4 counter clockwise or clockwise?

 

Pretty sure its clock-wise. Do it with the inlet pipe off so you can see the butterfly valve. Turn the screw a little at a time until you see the smallest of openings.