well im thinking it could be as when i was last up at martins he set the AFR on the car . then the car sat there for the rest of the day i was there then when i started it martin said to me dose it allways run like that when its cold as its running very rich now. but when the car has got nice and hot the car runs nicer but never had the banging and poping problem as the car was only running 15 psi now the boost has gone up to about 24 psi iv got a porblem