Hi, Have Subaru Classic import wagon.
I have upgraded the ECU to z4 and 3 port boost controller.
I have been told should be getting approx. 16 psi boost.


Issue I'm having is I get approx. 15psi but its only for about 2 seconds then drops to 11 psi.


Anyone have any ideas what cause could be.


Thanks

 

clean the boost solenoid fist and see

 

Is that the boost controller??
The three port ? And if so how do you clean them
cheers

 

there is a vid on youtube and it is the three port

 

Blast the ports with brake or carb cleaner whilst triggering it with a 9v battery and switch and a few wires soldiered together if you want to clean at test it on a bench.