i know i know, theres already a couple of threads like this, and ive read them, but i didn't see anywhere in them about the car cutting out at like 4000 rpm. my car is doing that, could this be the same injector clip problem?? or is it something to do with the headers?? if i run it slowly its just fine, but when i have it at boost and anywhere between 4000-5000 rpm, then it sputters, the rpms drop, and then itll "catch" again and go back up to those rpms and do it again, meanwhile black smoke is puffing out the back. any information is greatly appreciated!!! 
adam
adam