Hi,

I have a MY96 WRX with:

Flat4 Online Front Mount
Apexi PowerFC
Apexi AVR Boost Contoller (Mapped by Zen with A Setting mapped at 0.9 bar and B at 1.3ish Bar)
Apexi Super Intake Induction Kit
Samco Induction and Turbo Hoses
Few other bits and bobs

When the FC is set on A the car pulls cleanly and there is a normal amount of induction noise. However, When the setting is on B the car pulls pretty cleanly in 1st-4th but when in 5th and on WOT the following happens:

Serious Increase in Induction Noise
Major Hesitation and pulsing
Boost fluctuates between 0.9-1.3 bar

I have checked almost all the hoses and cant find anything that is coming loose. I would look at the packs but I cant make a connection between that and the increased induction noise

Any suggestions what to look for next?

Cheers

TB

BTW plugs changed under 10k ago

 

bttt