i got an fc3s.org jspec and i am finally tracking down an idle problem after getting the whole car put together. the only problem is that the BAC doesnt have an adjust screw on it... how am i supposed to adjust my idle and get it to smooth out? i heard the JSPEC BAC's didnt have adjust screws... how did the japs adjust their idle?

i just did the throttle body mod, cleaned out the runners/butterflies, took off TPS and reinstalled it, made sure there were no vacuum leaks, etc. and i realized my BAC doesnt have a screw in it so i really dont know how to adjust my idle other than timing (its about -5 retard) and idle stop screw... what do i do about my idle?

 

no j-specs have bac screws. use the idle stop screw.

 

 

the idle stop screw messes up my TPS reading

 

set the tps after you set the idle

 

And don't let anyone tell you that you need to remove the TMIC to adjust your Idle via the Throttle stop screw!