Qsx15 turbo wastegate control valve?

[Moffat]

It is stock. Any altercations have been done only temporarily as a test. And no way to dyno a tractor with no pto. Also I’ve had cummins out to watch the computer while driving under load. They were the ones who suggested intake sensor. Had a third paty mechanic who was the cummins master at peterbuilt out. Suggested barometric pressure sensor and reflash thinking the file might have been corrupt on ecm. I’m assuming one of these mechanics watching the computer actually knew something about diagnosing their engine. Cummins also came out to diagnose the fueling and metering actuators. The closest test you can do on a tractor like this is hook a similar unit to a similar implement and compare. We have a 375hp 9280 with 855 cummins that would be very comparable in pulling power