04 0.7 boost pressure problem - anotherbob
I'm suffering from "surging" under acceleration in my '04 Roadster. When accelerating from around 3500 rpm on about 75% throttle the car responds without any lag, the boost gauge swings up towards 1.5 but then without any alteration in throttle, the boost gauge drops back with a corresponding loss in acceleration. It picks up again immediately and then drops again. In a previous ownership the car has been remapped to 105bhp by Smart specialists and it is fitted with a "Forge" dump valve. I believe the latter was fitted in an attempt to smooth out the gearchanges.