right people i bought a wrx about a year ago, last owner had put a blitz Dual Boost Controller on it the solenoid has gone bad so have decided to ditch it and put it back to stock.
I spent today putting it back to standard with new vacuum hoses, the problem i have is when i put my foot down it will hit 15psi on my gauge. I wont lift ill keep my foot down and it will drop down to 10psi then will boost back to 15psi then drop down to 10psi and back up again and so on it wont hold boost.
I never had the old resrictor pill and my mate had one spare the only trouble is hes now told me its a 1.0mm prodrive one and not the standard 1.2mm could this be causing the problem or my it be something else.

 

what year is the car and have a look what ECU you have and we can tell you what boost it should be running.

 

Looking back at the OP's last thread it's a 51 plate Bug WRX... Which solenoid are you running? the standard OEM 2 port?

Shaun

 

it a 52 bug very low milage and all it has is a blitz nur spec cat back exhaust everything else is standard including the 2 port.

 

Put a 1.2 pill in it mate

Tony

 

so you think its that then its boosting really well untill peak then backs off then goes again is there anywhere apart from subaru i can get a pill from.

Dan

 

It's spiking because of the small pill size , either drill your old one out to 1.2 or a 1.2 mig welding tip will do the job

Tony

 

thanks for the advice tony. Been out in the rain today to sort it, drilled it to 1.2mm and its like driving a different car dont know why the last owner ever fitted the boost controller if he wasnt going to set it up right.

Dan

 

No problem , glad your sorted mate

Tony