I put DEF in my fuel tank...

Discussion in '6.7L PowerStroke Engine & Drivetrain' started by DudeInTexas, Jan 14, 2021.

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  1. DudeInTexas

    DudeInTexas SDD Junior Member

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    After owning my 2015 6.7L F-250 for 5 years, I made a big mistake just now. I got distracted and put a gallon of DEF in my fuel tank.

    Fortunately, I realized my mistake before I cranked the truck. It is sitting in my garage and I am about to drain the tank.

    Is draining the tank sufficient? Is it necessary to drop the tank and clean it out? Do I have to to replace the line between the tank and the filter? Do I have to replace the tank itself??

    I've seen such a wide variety of opinions on the web I am overwhelmed and kinda lost...

    I came here in hopes that some of you might share your wisdom and experience. Thanks in advance.
     
  2. carbonation

    carbonation SDD Junior Member

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  3. eZAK61

    eZAK61 Full Access Member

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    'Carbonation' is correct.

    Drop the tank, and remove pump combo unit. Clean tank with a good cleaner.
    Once you put everything back together, fill with fuel And add "Clear-Diesel" from Power Service.
     
  4. DudeInTexas

    DudeInTexas SDD Junior Member

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    Thank you so much for the replies. As per your advice, and out of an abundance of caution, I have dropped the tank to the point of disconnecting the sending unit. Disconnecting the connector in this picture is proving more difficult than actually dropping the tank. Is there a secret to getting these off? Or a better question - is there a resource that tells how to disconnect these and other Ford connectors? Despite looking, I haven't found one yet.

    Ford_Connector.jpg
     
  5. carbonation

    carbonation SDD Junior Member

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    That red tab is a lock. Using a dental pick, slide the red tab away from the locking tab in the male side of the connector. A slight push down on the male side tab, and pull.
     
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