He've just bought a car few weeks ago.the car has came up with the aftermarket boost gauge.
he told when he let on the pedal or kick down.the car feel like no any pull up at all and the boost gauge never shown above "0".It means no any boost.So Is that probably from
N75 solenoid valve,Turbo hose leak(where should I start to look for)or else?

Thanks

POP