Hi Peeps, first of all what a great site you have.
I have a prob which is proving to be a pain in the a**e!! My 03 STI is modded to approx 350bhp and has a Greddy boost controller fitted. Over the past week the boost limit on the controller seems to be cutting in very early (suggesting overboost) if I lift off the throttle and then back on everything seems fine! Has anybody experienced the same? In every other respect the car drives perfectly. Do you think the boost controller is at fault, my thoughts are a sticking valve. Any Ideas would be grately appriciated.

 

bttt