What causes this?
i had my spring backed all the way down to 8psi about 3 weeks ago. recently, it wont go below 9.5, and creeps up till i hit boost cut at 10.5 psi. around 5500 rpm.
the wastegate cant be adjust down anymore.
what i do know is that im running an open downpipe, whereas before i was running a super restrictive exhaust.
is this possibly weather related? or related to the open exhaust? i dont really want to buy an MBC.
vacuum leaks, or exhaust leaks before the WG?