My 850 turbo 130,000 miles has lost its turbo. When I accelerate my wagon acts like a regular car now, it will accelerate but there is no turbo boost to it. The turbo gauge backs this up, it stays to the left of turbo area. I am also getting a shakey idle at start up. It used to rev high for a short bit then come back down to normal. Now, it has a tough time staying high enough and has even stalled once (first time for this ever). No current check engine light. I did recently replace the air filter, is it possible I knocked something loose? Don't figure thats it but you never know. Thanks in advance.
Swede