I recently bought a 2004 JDM 2.0 STI with stock tune, AEM intake, HKS bov, full Sebring exhaust, TwinDisc HKS clutch. The spark plugs are new.
I made some logs to check the car out and found something strage....when it makes boost (10psi+) it starts knock correction +7 and climbs up to +10....but doesn't light up any engine code.....
It does this with the MAF pugged or unplugged, with the stock map and with a stage1 map that I had from me previous 2002 STI.
What else can I check can I check to see what's wrong beside the maf sensor ?