PSI dropping please help ??

[topza501xx]

Hi.

i have a bl5 legacy gtb running at 16psi. Ever since i change my stock bov to a hks ssqv and plung off the recirculating pipe my psi has drop to 10psi. it ran fine (at 16psi) for a few weeks. ive now put back the stock bov and it was running at 16psi for a few days, now it drop back to 10psi. why is this happening ?? im new at this, never own a turbo car before. please help.

[rex-leggy]

could be a boost/vacuum leak on the parts that you have touched

[Guest]

Swap it back to the stock valve unless it was faulty. Car will be better for it. No check engine light or anything silly? rough idle/hunting?

[topza501xx]

ive just check all the vacuum hose today and everything seem to be fine. but something weird happen yesterday. when i boost the car with the eco button on it only boost up to 10psi. once i turn it off and boost it again it max boost at 16psi. so i thought the car was fine. until i try it again today boosting with the eco button on and off and it still only boosting to 10psi. so is there something els i should check ??

[topza501xx]

when i run the car on hks ssqv, the check light didnt show up it ran fine, only once in a long time the rev seem to drop.. then the psi drop so i put back my stock bov, it was boosting at 16psi as normal till it drop back to 10psi again..

[Marky]

Limp mode being triggered I\'d guess?

[Guest]

pm subierex see what he says. Hes local with you and fixes heaps of cars on here.

[Subirex Automotive]

pm me and i\'ll see what i can do.

cheers