Engine:1.5 Head08 Z6 Intake Mani:B7 ECU28 Dizzy: TD42U Engine code: Only the o2 sensor because we dont have it yet. The cars starts up on first crank. You can rev it but try driving it and it has no real go. My brother told me he had a 2.25 exhaust pipe done and I'm thinkin there was no need for and could be part of the problem because it lacks back-pressure and by the way the car is too damm loud. So am I right?