I recently had my 02 WRX serviced by a certified mechanic for a 90K service. When I got it back, I noticed that the wastegate no longer opens no matter what RPM or throttle position. In second gear, the factory boost gauge is tached out to the max by 4500 RPM. In 5th gear, boost is tached out at around 2500 RPM. By taching out, I mean the boost needle is all the way to the right of the gauge. There's no engine light. The turbo still works and sounds fine below these RPMs.
I suspect that the mechanic may have reconnected some of the vacuum lines wrong. Where should I look and what should I try?
I could bring the car back to the mechanic next week, but I don't wanna have to drive that far, if I could just reconnect the vacuum lines myself.