new car glithes help

bug-eye09

Sunday Drivers
got my v7 jap sti a week ago so have had some time to get to know its little problems i was told its mapped its boosting at 20 psi 1.45 bar has a turbo back blitz nur spec so if not mapped the cel light would come on? and without a boost controller why 20 psi besides a restrictor in
first thing is in 6th gear at 100km if i floor it it boosts erratic from 20 psi to 14 and can feel flat spots possible maf?
will check at the weekend if its a simtek or something can anyone tell me if its ecotec,ed
 
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