What is your question?
Not sure why this is happening, but I have CEL P0171, 0174, 0420 combined and when I start the truck and while I'm accelerating, it makes this random loud turbine sound as if it were jet engine powered. It sounds cool, kind of eerie at times, sometimes like wine glasses making that sound when you rub your finger around the glass rim, and it changes pitch with the engine RPM. Really weird s*#@. One auto shop says it's the brake booster, the other said it was PCM, but he didn't hear the turbine sound until I showed him and he said that sound paints a different picture. The one that thinks it's the brake booster did the smoke test and everything else came back normal such as the intake manifold. The one that said it was the PCM said "Your fuel trim is within parameters, but at 2 mph and 780 rpm, you're at 75% engine load? That doesn't make sense unless you were hauling something". Just last night I smelled rotten egg while driving. This was after a while of driving, not during warmup.
What makes this problem better or worse?
I don't know
How long has your 2000 Ford E-250 Econoline had this problem?
Almost a month now
Vans have an echo effect that can make driveline noises more pronounced - which can be extremely difficult to locate or identify. Possibly operating vehicle while hoisted may help. (Random thoughts)