Today my Boost Duty Cycle dropped out for some reason and I can't see any reason for it. So I was hoping someone could help me understand.
I floored it on the freeway and when it got to ~5775 rpm the DC dropped from 100% to ~57% and stayed there. Normal is it stays at 100% until I let off the gas. My minimum duty cycle is set to 40%, and minimum is what it would drop to when the turbo faults out. So it apparently it didn't do that, but what did it do? The DC could then move between 40 and 57, but never higher.
I had to restart the engine to reset it, then floored it and it was fine, but minutes later under load at ~3K rpm, it did it again.
I can't see any reason why it happened, or how it's capped at 57.
I also got an underboost code, which is really weird. Underboost is set to 2.9psi and it's timer is set to 9.99 seconds, neither of which I was anywhere near.
Attached is where it dropped out:
DC loss 1.hpl