I'm not worried so much about the CEL, I have had a constant CEL for about the past 2 years , until they cleared it when my car was in for clutch work at Mastro, the thing I'm worried about is the hesitation between 3 and 4K RPM. If I could get that squared away, I wouldn't worry too much about the CEL, it would be all good. It is just really annoying hitting 3k and just having your car lose like 30% power while stuttering (and it's not like I'm losing 30% of 300 ponies, where I would still be pretty quick, I'm losing 30% of my stock 165 or some analogy between a fast car and my slow car)