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    fordman47's Avatar
    fordman47 Posts: 1, Reputation: 1
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    #1

    Sep 17, 2012, 09:55 AM
    2003 f250 6.0 will not start after driving 30 miles or more
    My problem occurred when I drained warter seperator 4 times & drain plug stripped.
    I have changed water seperater still does same thing. What could cause 6.0 not crank after warm up.
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
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    #2

    Sep 17, 2012, 12:32 PM
    On diesel engines that will not restart, after they are warmed up, it's often a sign of a tired fuel pump. As they heat soak, inside pump head clearances increase and it will no longer develop sufficient fuel pressure at cranking speed. While it's running, fuel helps cool the pump by carrying the heat away. If this sounds like your situation, install a new Motorcraft fuel pump and under frame fuel filter.
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