i have a very high idle when my car starts at anypoint, its worse when its cold, but thats because its still in closed loop. when its cold it idles at about 2000-2100 RPMS until it warms up and then it drops down to about 1400-1700 depending on what mood its in... and i cant for hte life of me figure out what the problem is

ive checked and cleaned my IAC, as well as set the idle a FEW times... it will set the idle fine with the pins A&B jumped on the ALDL, turn it off plug everything back in the right way and start it up... runs fine, take it for a ride around the block, bring it back and shut it off.... start it up a few minutes later and the problem is back. and the thottle linkage stop is not touching the idle set screw stop on the TB itself... even though the IAC is cleaned, could it still be bad, anyway to test if it is bad or not ?

i checked the TPS, seems to be normal

sprayed down the engine back with carb cleaner to look for any vacum leaks and coudlnt find anything at all

the only other thing that i can think of would be my timing....

the car used to be a auto... now its swapped to a manual, should i have reset my timing when i swapped it over ? is the computer still looking for the torque converter and causing the engine to idle high because its not there to slow it down ?

 

replaced the IAC today... didnt change anything

 

You already found your problem, if your throttle stop is sitting against it's stop they your throttle blades are getting hung up on something. Most of the time the throttle blade shaft wears into the throttle body itself which leads to the throttle blades to hang up. Try jiggling the throttle shaft while you try to shut it and I bet your throttle will come down. Only fix for this is a new/newer TB.

You might try to take that IAC valve back, those things aren't cheap.

 

then why does it only do it when the cars running ? when the car is off it goes back all the way against the stop...

 

Vaccum

Believe it or not your engine sucks hard enough to cause it to stick. I had the same thing happen to me with a TB, it moved smooth as glass with the car off but would stick like crazy when running.

 

is there anyway to take the throttle linkage off and take the shaft out to inspect it ?

the more i think about it, it makes sense, because i can remember afew times where i have hit the gas quick while i was stopped and as it idled down it had dropped down below where it usually is, more towards the normal range... which could just be teh throttle blades not sticking for some odd reason... but its not common and its only happened a handful of times over the past year