hi guys, i'm having problems with my turbo cabrio, its running s2 erst engine and management, chipped, alloy cooler, flowed head. its running 16psi but when you floor it it will pink initially but go after a few seconds but wil pink for a little longer in 5th, but if i turn the dizzy all the way towards the front of the bay it dont pink at all but has massive lag, its driving me mental as im worried the engine is gonna pop, its running slightly rich wud this cause it?, i have changed the metering unit, plugs, leads, cap, arm, anything else i can check?

cheers in advance