I TOOK OFF THE INTAKE on my 87 sport today to 1st . do the throttle body mod 2nd. to look for a vacuum leak seeing that my car's idle fluctuates and is also high in the rpm's while fluctuating. i replaced the lower intake manifold gasket eventhough i had a rebuild 4k ago . cant be too sure. i saw no hoses loose under the manifold. i sprayed starting fluid everywhere after the re assembly and i got nothing. the throttle body mod seemed to have let the idle go down a little bit. now im idle fluctuating at around 1300-1600 rpm's at idle. have i missed anywhere?anything i havent done? can anyone help me out? any suggestions will be helpful
thanks
jack

 

Adjust your tps.

 

i had a good tps today but for some reason the button on the tps got stuck so i had to use an old one i had sitting around and that is making the idle die down a lil and i think this tps is bad. maybe ill have someone adjust it for me and see what that does. but anyone got any other suggestions

 

ohh yea thanks for the input drox

 

BUMP

 

ANYTHING ELSE SOMEone can reply with because im stuck here with one opinion and i hate this idle
thanks
jack

 

Mine does that some times but after it warms up it drops back to normal.

 

my idle is messed up aswell...mine freaken idles at 1700.....and i have to press the accelerator when i first start the vehicle or else it dies..

 

does n e one know what might be causing this?

 

First off, lets answer a few questions:

1. Did you disable the thermowax?
2. How much into the TB mod did you go?
3. This high idle, is it while warm/cold?
4. Have you adjusted/set your TPS?
5. Have you set the idle per FSM/BAC?

These will help in guiding you to a fix.

~J

 

OK WELL :
bac isnt responding to me and i can unplug it and no change in idle.
tps was set but need to do that again and get a new one probobly
did the whole TB mod
and it fluctuates when its cold and when its hot

jack