i would advise getting that looked at NOW. the qpeng ecu dosent have half of measures to protect your engine that the stock ecu has. is it's getting boost spikes that really isn't good.
or if your doign it't yourself you'll just have to work through till you find the fault
Boost spike sounds more like what im gettin than a missfire.
Just changed the n75f for a new 1 and held 17psi but leveled out at 13ish it only really (spikes) when ya floor it if ya feather the boost in NOT a hick up just seems really strange
maybe change the actuator now n go from there..
