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1990 Ford F-350 Question: after driving a bit when weather is hot it drops a lot of power, chokes, bucks badly

 

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survivorstough, 7.5L V8, Harrisburg, PA, April 06, 2010, 16:32
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1990 Ford F350 w/ 460 Fuel injected engine. after driving a bit when weather is hot it drops a lot of power, chokes, bucks badly. the fuel filter is new. there is no catalytic converter & there are no vacuum leaks. very frustrating please help?

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  • Medium-star Best Answer
    April 06, 2010, 17:07
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     Master

    first thing i would try is a fuel filter. if that does not work, have the fuel pressure checked.

    Roy

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  • Answer #2

    April 06, 2010, 21:46
     Journeyman

    Also check for vacuum leaks!

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    Hilario12, July 22, 2013, 19:31
     Rookie

    We all ready done this to the truck and it is still choking we checked fuel pressure check check vacuum leaks

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  • Answer #3

    August 15, 2014, 21:38
     Rookie

    My F350 1994 pretty much poops out above a 100 degrees. It is a vacuum lock in the fuel line I am sure because as soon as the weather cools down a bit it works fine. I was told that a "fin" could be installed around the fuel line prior to entering the carburetor to help keep it cool,but have not tried it.

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