Ive got a stock throttle body of an 87 in my 89 camaro, so I bought a new GM cable for an 87 TPI car. I hooked the cable to the pedal, then went to hook it up onj the throttle body and it seems that I have to crack open the throttle a little for the cable to reach. I though through the IAC and such that the throttle blades were basically 100% closed at 0% throttle?

Another thing, I'm swapping from TBI so I have no idea how the TPI went together. Which hole should the throttle cable go through on the bracket that mounts to the side of the plenum? Im not using cruise, and Ive got a T5, so there's only going to be one cable. I just wanted to make sire Im using the correct one, is it the one on top closest to the plenum? Thanks guys!

 

well the TB isnt exactly 100% closed all the time, there is a idle adjustment screw that works with the IAC to keep idle happy. the blades are slightly cracked open at idle. How much of a difference is there? Does it open alot? even the slightest amount will move idle. for your combo raising idle speed would be ok, 800-900 rpm idle would be great.

IF you have the 3 hole bracket for TPI cars, the throttle cable should be the top inner most hole. The outer top hole is for cruise i believe while the bottom is TV for auto trans

 

so I would assume that the inner most hole on top would be for the cruise? Thats the one I have it on now. Im going back out to the shop today to see what the deal is, it seems like when it's on the outer most hole its open way too much

 

disregard post, see above post for cable bracket info

 

sorry, I read that too quickly, I get ya now.

I took some (crappy) pics with my phone to show you what Im talking about. Also, I cant seem to find any kind of set screw. I see a threaded "rod" that hits the linkage, but there's no real adjustment.

ALSO: notice all these pics was when the cable was mounted on the INNER most hole. When mounted on the outer most, it's open even more.

 

one more that shows just how far open the throttle blades are. does this look normal? Would it matter that the TB came from a trans am? I got a cable for an 87 TPI, I didnt think there was a difference between camaros and trans ams

FYI: This is a stock throttle body, I just took the blades off and coated them in candy red, looks kinda like the Holley TBs

 

that does appear to be WAY far open than normal... cable seems to be too short.

And the idle screw is where the top of the linkage rests against the body of the TB. its the top outter part of the TB. You can see it real good in the first picture you attached... but its not touching the TBlinkage since your cable is short and opening it up toooo far

 

Ill go back and double check my part numbers, but the cable is supposed to be for an 87 TPI car. Again, would there be a difference between camaros and trans ams?

The idle screw reall isnt a screw, its like a stud thats made into the TB housing. I cant adjust it, is there supposed to be a threaded shaft or nut on the stud to adjust? RIght now there's nothing on it

 

on the back of the TB there is a plug over the screw. Gotta knock that out to access the screw but your problem looks to be a short cable or something else

 

The more I get to thinking about it, Im wondering of the cable is not seated properly on the pedal side, or something is obstructing the pedal from coming all the way up. Ill have to check that out tomorrow, the cable seems to be right and knowing my history with overlooking the obvious I wouldnt doubt the problem lies somewhere on the pedal

 

Got back out to the shop today, I think I found the problem. There was a bracket that was mounted on the pedal that seemed to interfere with the travel of the pedal. I took it off, and it got a little better.

It's still a little off of the idle screw, but Ive found now that there's 2 "stops" on the pedal side of the cable. One mounts on the front side of the pedal (the side that your foot's on), and another that limits the travel by hitting the plastic grommet that mounts to the firewall. Right now at rest the cable "stop" is hitting the firewall grommet, limiting the amount the blades can close at idle.

The blades are more closed now, but it still seems thats it a little too far from the idle screw. The screw still had the cover over it, so I would assume that it hasn't been adjusted and its set as it was from the factory

 

so far from the pics Im seeing the innermost top hole is for the throttle cable. Ima swap it out tomorrow to see if that changes it. Maybe thats part of my problem too. But weird thing is on the cable itself, where it clips into the bracket, there's a slot for a small tab to slide through, and the tab is only on the outermost hole. weird Ima do some mrore research to make sure I aint chasin my tale on this

Orr89RocZ: I think we may have gotten this wrong, I was lookin at your photo album and it does appear that the throttle is on the inside hole, not the outside

 

wow i got confused and really messed this up lol

your right, i was wrong. the top outter is for cruise it seems and the inner is the throttle cable

the bottom is TV cable for my trans

my fault, when i looked real quick on my car i traced the cables back wrong
sorry to cause that confusion

i gotta edit the above posts

 

lol, all's good. I got confused too, I should did some more research before I asked. Note to self:

 

let us know if that new position works out better. it should give the clearance needed