Hi guys, just bought my frist camaro 91 rs 305 tbi auto.
and have problems with it . nerer work on tbi or any with ecm all my rods have been 68 and older pontiac "gto's". my problem is my idle is running about 1500 rpms in park and 1000-1200 in gear . it dose start and go thouth high idle then warms up and drops a little , like about 400 rpm, like what i think it should. but its all happening about 500-600 rpm to high. please help! here is alist of what ihave done so far with no change. the car dose run great with good power.

a: check for codes, none found

1 new fuel pump . "car dead no fuel" new pump car starts!!
2 tbi gasket , clean tbi. " no change"
3 replace iac "no change"
4 removed cap and ajusted idle stop screw "no change"
5 replaced gas cap " no change"



thank for any help i could get.

 

https://www.thirdgen.org/newdesign/tech/tpimod2.shtml

 

thanks now i'am getting some where. that did give me control over my idle, but gave a hesation thanks alot ill mess with it tonight some more

Dave