Falcon Oath

Tried 3 different solenoids, so unless it's the ECU holding it open I'd think it's not that, must be a boost leak then

Yeah I'll have a check for peace of mind, I've also tried re loading the tune and no luck with that, I'm just leaning towards wastegate actuator now, but usually when they go it's the diaphragm and they over boost not under boost.

Doesn't sound like a boost leak though ?

So my BA XR6 Turbo, suddenly dropped boost pressure from 10psi to 4psi, ive been running a Gizzmo Electonic Boost controller, so naturally thought it was the Gizzmo solenoid had packed up, so swapped it back to standard boost control solenoid, but still no good, have since tried another known good solenoid, still no luck, it's plumbed up correctly, also has a brand new aftermarket plumb back BOV, setup correctly, and not leaking, so that also eliminates that. I need some guidance