Question about 1999 Ford F250 Regular Cab

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First let me say, the problem is intermittent. you can turn it off and restart it and the problem will be gone. the problem is SEVERE power loss, as if it is drowning. It makes a whole different sound, like its suffocating. There is no blown head gasket, no water in oil, no coolant loss. I am leaning towards the computer maybe? Help, I need my truck, it is my livelyhood.

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  • Juan Guillen Oct 16, 2010

    hi.. could be a restriction in the exhust system.

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  • Ford Master
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If you have Electronic traction control, there is a flap valve around the Air filter. When this style Traction control activates, it blocks off the air intake and applies the rear brakes if the RPM does not drop. If the RPM drops through air strangulation, you would not notice the braking. You did not say if there was an RPM loss.

Next, I would consider "floaters" in the gas tank. When the fuel pump is pumping, the floater may randomly block the internal pump filter none, part, or fulltime. When the draw is stopped by killing the engine, the particles drop until they are pulled up again. Under ideal conditions, when it does this again, let the engine idle and check the fuel pressure at the fuel rail. Not very practical, but it would verify fuelpump problems versus the computer.

Knock sensor- will ****** timing when activated. Limphome mode- will ****** timing and top RPM when heat sensors detect overheating.

You can get a free scan at Autozone or Oreillys, it may help. At least if there is a problem with the computer, the scan may tell. Next time it does this, look at exhaust. If I is flooding you should see it in the exhaust.

Posted on Oct 16, 2010

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