Originally Posted by slow92

I know I already posted this in your other thread but I will do it again. I made 400whp and used bkr7e (I lived in Savannah so it is hot there) gapped to 0.028 and my car started breaking up in the higher rpm range just like yours. So I took it back to my tuner so he could put it on the dyno and try to figure out what was wrong. It felt like fuel cut but then would power through it and pull to redline. After 30 minutes we figured out it was the ignition. We checked each coilpack with a diode tester and they were all firing and at about the same speed. I couldn't borrow someone elses coilpacks to figure out which one it was so I upgraded to ls1 coilpacks. I know you can't do this because you are using a power fc, but once I switched over the car pulled like no other.