Occasional boost = dying turbo?
I'm wondering if my turbo might finally be on its last legs. My car currently has 92k on it and everything in my profile is up to date.
In 1st, 2nd, and usually 3rd gear, my car drives like it should - there's plenty of power and nothing feels or sounds unusual. In those gears, both my Prosport Electric boost gauge and my Cobb AccessPORT read boost in the high teens (psi), but in 4th and 5th gear, it feels like I have no power beyond what the engine produces and the boost reads between 0 and 5 psi (+/-) with the gas pedal held to the floor if I'm lucky.
I've visually checked all the connections that I can see in the engine and everything looks ok. I've also listened for any leaks and I didn't hear anything obvious. I reset my ecu with my AP and the same exact symptoms are present. I didn't see any smoke coming from the exhaust, the car doesn't consume an unusual amount of oil, and I didn't smell any unusual smells.
Honestly, I'm just about at the limit of my diagnosis abilities.
Part of me is hoping it's the turbo so I can upgrade that (and I'm not sure exactly what to get yet), but part of me is hoping it might be a simple fix. Anybody have any ideas what it could be based on my description of the symptoms?
07 WRX (Albins 5MT + Blouch 20G)
Jorge Carrillo Tuned (365 whp/340 wtq)