Thanx mate, ive just been reading up on how the turbo works (www.turboregal.com) and what you said about the atuator and wastegate seems to be the problem that i have, hence the wastegate being open the extra boost is pushed through the exhaust system hence the afterburner sound i get (if im correct in saying that)?!! Was the loud pop i heard and the sudden burst of smoke the atuator coming off???

you lot know your s**t dont ya

Many thanx Lee