OK, this is a weird one.
Background; Engine was running fine, no issues. Turbo oil line broke, had to get a flatbed ride home.
After I replaced the oil line, took it out for a drive.
Seemed normal, until it reached operating temperature.
At that point, whenever I accelerated up to about 3200 rpm, the fuel seemed to cut off. Completely. It was like hitting a brick wall.
The fuel simply shut off, and will remain shut off until 1. I let off the pedal completely
and 2. it drops back below 3200 rpm.
I changed the fuel filter, thinking the flatbed ramp had stirred up sediment or something, but it's the same.
It does NOT do this when the engine is cold.
It happens regardless of throttle position, even holding the pedal steady, if I go down a hill and the van drifts up in speed, the fuel cuts at the same point. Full throttle or cruise or slack throttle, same results.
Power output seems to be the same as before. Pulls like a freight train, until it doesn't, and everyone's head snaps forward and they look at me like I'm a dick doing it on purpose...
It is also suddenly difficult to start, even on a hot day without plugs and cold start, and stutters and smokes white like it's below zero out.
At this point I'm thinking the pump jumped time somehow... maybe the governor is kicking in? It used to rev freely, this came on all of a sudden, after a non-fuel repair. WTF??