What is wrong with my ls motor????????? idles fine when it is held at a certine rpm the exust breaks up and it stutters and it doesnt sound right. the wireing is fine (thanks Neal) and when i walk it out to about 3500 rpm and then romp on it it goes till about 5000 and then pauses for a sec then stutters really bad as it is going. im thinking it might be the dizzy but am not sure if anyone knows lemme know i hope this is enough info thanks.....