this is my problem. my car starts perfect, does its little 3000 grand start up i blip the throttle and it goes down to about 1100-1200rpm until warm. when warm it will idle between 750-800 rpms. now it gets interesting
after ive been driving for a while and come to a stop it will "sometimes" idle at 900 rpm then after about 15 seconds or so it will go to 750 for a bit then back to 900
and sometimes as low as 650rpm. other times it just idles perfect. i am going to adjust the tps but i was wondering if it could be anything else if it doesnt help.
if it helps i have a k&n cone filter and a blitz blow off valve.

can someone post me a link for the tps adjustment im trying to search it but am coming up with nothing.
thanks

 

do a compression test, usually it is the most obvious thing, ignition or compression....in my cases...