2000 Ford E-250 Econoline Why does my 2000 Ford E250 5.4L V8 NA engine makes turbine sounds
Why does my 2000 Ford E250 5.4L V8 NA engine makes turbine sounds
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?
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Hello, first: get another opinion. It does not sound as if the shop you are utilizing is getting to the root of the problem.
First, a P0420 - that is a catalytic converter inefficiency code for bank one. You likely need a replacement catalytic converter.
P0171 and P0174 are bank one and bank two lean codes -- meaning that whatever is failing affects both banks of cylinders at the same time. This is usually due to a vacuum leak in the engine area, or a mass air flow issue. The engine's processor thinks there's a ton of air and continues to dump fuel in order to balance this out.
The thing is: if the technician you are employing is skilled, trained and has proper equipment -- that tech would know as much or more than what I'm telling you right now.
A hunch about your turbine noise is maybe even resonation of your air filter in the housing -- just a thought. Replace your air filter with a genuine Ford replacement and see if the noise remains.
Does the vehicle have to be n motion before this sound occurs? .. Will it occur while sitting in the shop service bay?
That just may be a significant clue - - possibly ‘driveline’ related.
Good luck!
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)
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)