2002 Wagon, Catless belmouth downpipe, catless up-pipe, HKS exhaust and Cobb Accessport flashed at stage 2. <600 ft elevation.
I have been at stage 2 for 15 months and have never been able to hit target boost.
things I have tried,
- various base and real time maps including HWG which I am running now
- adjusting the wastegate arm.
-going back to stock.
-monitoring boost with both aftermarket boost gauge and the Accessport
I hit about 14.5 psi in 4th and 5th, the wastegate arm adjustment allowed me to hit higher but the ecu would keep 'bouncing' the boost back down to below 15...let me explain, it would boost say 16 or 16.5 psi under load and it seemed like the ecu would step in and limit the boost back down...spike back up, then back down etc.
I have contacted Cobb and exchanged emails with Jason. He seems to think it is a mehanical issue. I can't see how, the car can build boost beyond 15 psi but the ecu doesn't seem to want to let it. I never had a issue with it not making full boost in it's stock form and actually reverted back to stock (minus the up-pipe and hks exhaust) for my emissions test last month and was still making 13 psi.
Any input woould be much appreciated.