In my SC, when the car is cold...it starts right up and idles perfect, i drive somewhere...shut it off...go into a store for like 15-20 minutes...come back out and start it...it idles sooo bad like its about to stall and i have to give it gas to about 3 grand and hold for a lil to keep it running, and as soon as i drive it maybe 20 feet...its fine and will idle sooo smooth from there on out....i shut it off....wait 30 seconds and start it....beautiful idle....shut it off again...wait 3 minutes....start it....beautiful idle...shut it off....wait 10 minutes...start it up...and wont idle worth a crap and stalls...??? any ideas??? my friends SC does the same thing and he replaced his crank position and it still does it...