no check engine light. the timing is retarded a little more than 2 degrees, but i know that's not the cause because it just started doing it one day. i'm also trying to track down some 450cc injectors to swap in soon. i read another thread and the guy had similar problems and someone had suggested the tps. i'm going to check the voltage on it when i have time. oh the other thing is that whenever it wants to die, my a/f gauge stays locked in stoich instead of going to rich like usual. i just replaced the o2 sensor also, so i don't think it's that. thanks.