[Lazy J]

Hey Guys...just looking for ideas on what could be causing my boost to drop from a normal 10psi to about 7psi for no really reason

I have a Subaru Forester S/tb 2ltr Turbo with a 3” Milltek exhaust system with Sports Catalyst with a Perrin front mount, lowered on TEIN springs along with a chassis brace blah blah blah..anyhow it is normally running at about 290 bhp its a 5 speed Manual and normally would do 0-100kph in about 5.9 sec
all of a sudden today I noticed a decress in boost from 10 normally to about 7 in all gears....could this be a fuel pump issue perhaps or not?

Tah

 

[absubtle]

Are you still using the factory boost control system? If you are and the ECU sees knock (detonation) enough, it will pull duty cycle from the boost solenoid, cutting your boost pressure. Any check engine lights? Sounds like you are just running wastegate pressure. Boost solenoid disconnected? What are you using for engine management? Ecutek, Cobb AP, OpenSource?
Absubtle
CO (USA)