Question about 1990 Ford F350

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85 ford diesel 6.9

Losing prime on fuel sys. after sitting overnight, will start but runs out of fuel and have to crank over aprx 20 sec. to restart.

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  • RV doc Sep 20, 2008

    i tryed replacing the shrader valve and it did not help, trying the fuel pump posable lhe check valve is bad.

  • RV doc Sep 26, 2008

    i replaced the fuel pump and it still has the same problem!!! no change at all.

  • Dave Danielson
    Dave Danielson Mar 10, 2009

    It will start and then runs out of fuel and dies . . takes a good minute or two of cranking before it will start again. Its fine as long as it doesnt sit more than a few hours.

  • Anonymous Mar 26, 2014

    prime cabarator will start,not holding

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  • Ford Master
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Most common cause is a air leak into the fuel system at the filter bleed valve.

Posted on Sep 20, 2008

  • yadayada
    yadayada Sep 20, 2008

    Yes that is a common failure, we used to replace those pumps like they were going out of style, I worked as a Ford tech for 30 years, retired in 2003

  • yadayada
    yadayada Sep 27, 2008

    Check all the fuel line connections from the pump to the engine, the injection pumps can cause this to, that paticular pump did have some issues on high mileage engines.

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I had same problem fuel tank sending unit was what was wrong

Posted on Feb 06, 2009

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