Originally Posted by UncleSchnitty
I really hope its just the leak from the bov gasket missing. After that my plan is to either 1. get an intake/exhaust leak test. 2. put on the cattless uppipe/downpipe just to rule out those exhaust points.... the turbo being is issue is kind of a mute point to check since it only has 1500 miles on it and was checked twice by subaru (that being said they didnt notice that it was only putting out only 7psi after the $2,000 install and another $250 to have it double checked)
wait. a dealer did a turbo R+R on this car and never shook it down?
that's some ****ed up **** right there.
you're on the right track with your thinking. the test you performed basically eliminated the ecu map and the solenoid and the wiring harness and the boost control system plumbing (hoses, restrictor pill etc) as the issue.
so what's left are the massive leaks or the wastegate not seating/sealing. certainly a missing bpv gasket is a pretty big leak, but i don't know if it's THAT big. a bad bpv itself could also cause this kind of issue (and is hard to troubleshoot because it doesn't cause a change in afr/cel).