Ok, Hope this isn't too vague.
The car in question is not a Vauxhall, but is a turbo.
Basically the car used to run a steady 9 psi, but now is getting around 8.
What are the prime suspects for a drop in boost?
The car has done around 90k miles and is standard, to my knowledge it has the same turbo it was born with.
Don't wanna divulge the exact car, but hope you can help as I'm guessing there are a few key areas.. actuator/hoses etc?
Cheers for any help.
P.S It'll be going on a diagnostic machine next week, I'm just impatient and love the car!