Question about 1999 Ford F350 Regular Cab

1 Answer

No power bogs out spit and sputters under throttle but runs perfect at idle

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  • roy nadeau Jul 25, 2013

    scanner says bank 1 and 2 are lean and o2 sensor bank 1 and 2 are bad i changed them and it does the same thing any ideas

  • Layne Johnson
    Layne Johnson Jul 25, 2013

    if its running lean it could be old bad spark plugs or wires or fuel injectors or dirty air filter also check your throttle plate on your throttle body if its really black clean it

  • roy nadeau Jul 25, 2013

    tried all of the above and still no luck i cant give it more than quarter throttle or it spits and sputters so bad it wants to stall out but as soon as i let go of the gas it clears up an idles fine

  • roy nadeau Jul 25, 2013

    and the fuel pump sounds strong and it has plenty of fuel pressure

  • Layne Johnson
    Layne Johnson Jul 26, 2013

    clean all of the black stuff off of the thottle plate and change the air filter also is the check engine light on ?

  • Layne Johnson
    Layne Johnson Jul 26, 2013

    also pull off an clean your idle air control valve and clean the passage way to it to

  • Layne Johnson
    Layne Johnson Jul 26, 2013

    it could be a clogged fuel line to or fuel filter



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Sounds like a vacum leak or the throttle position sensor im not 100 percent sure but that what it sounds like to me

Posted on Jul 25, 2013

Testimonial: "its worse when it gets warmed up and has gotten worse over time now its to the point where the truck will barely move"


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Posted on Jan 02, 2017

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SOURCE: 99 escort sputters and stalls, engine bogs down in idle

The CAMshaft position sensor is faulty.

Posted on May 06, 2009

  • 6674 Answers

SOURCE: motor bogs at half throttle, under that runs good

First I'd confirm proper fuel pressure, then I'd look in to possible plugged catalytic converter. Any other symptoms such as sluggish up hill, worse when warmed up, poor fuel mileage?

Posted on Mar 12, 2012

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