04 WRX, 19k mi, stock minus silencer, EGT in manifold, boost gauge
Over the weekend I got an unexplained CEL. Then I noticed my turbo had been making a very faint high pitched noise for about a day or so and then went intermittent and then stopped completely. I'm worried it s'd the bed. I've visually checked the vacuum lines to no avail. Could it be the boost solenoid? how can i check the lines more thoroughly? i should have a MBC coming tomorrow in the mail that I was going to use w/ a UTEC (not installed yet). EGT at the manifold is below norm as to be expected w/ no boost.
Am i correct in thinking that installing an MBC will help eliminate the solenoid as being the problem? Could it really be the turbo, i figured when they went it was a lot more eventful... Dealer is booked for a while here and I wanna try myself b4 bringing it in. The motor seems to be running ok otherwise so could it be a clogged cat? It worked fine, and then not at all, not a gradual loss of boost.
Any help greatly appreciated!