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Thread: 4d55 random power loss

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  1. #1

    Array
    Status
    Offline
    Join Date
    11-07-2015
    Posts
    51
    Location

    BC, Canada
    Vehicle

    1986 Dodge D-50
    Engine

    4D55
    New fuel filter just before this started so I wouldn't think its clogging. And what do u mean by pickup? I pulled off the line entering the IP, and turned the key to engage lift pump. It started pushing fuel but with pretty low pressure, like a weak stream just dripping out. Seems to me like it should be pushing a solid stream of fuel...
    Any reccomendations on pumps for these engines?

    Cheers

  2. #2

    Array
    Status
    Offline
    Join Date
    04-29-2014
    Posts
    68
    Location

    los angeles
    Vehicle

    1985 Mitsubishi Mighty Max
    Engine

    4D55-T
    Quote Originally Posted by Jmuirhead9 View Post
    New fuel filter just before this started so I wouldn't think its clogging. And what do u mean by pickup? I pulled off the line entering the IP, and turned the key to engage lift pump. It started pushing fuel but with pretty low pressure, like a weak stream just dripping out. Seems to me like it should be pushing a solid stream of fuel...
    Any reccomendations on pumps for these engines?

    Cheers
    No recommendation here, because on the Mitsubishis, they don't even use a lift pump ... it all just gets drawn from the IP.

    Since you do have a lift pump, and it provides a weak stream.... well, that sounds kind of like a clog to me.... I wonder if you could turn the pump around and try to squirt fresh fuel back through the lines into the tank, just to see if anything gets unclogged?

  3. #3

    Array
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    Offline
    Join Date
    01-18-2015
    Posts
    250
    Location

    Inwood WV
    Vehicle

    1991 Mitsubishi L200
    Engine

    4D56-T
    Quote Originally Posted by Jmuirhead9 View Post
    New fuel filter just before this started so I wouldn't think its clogging. And what do u mean by pickup? I pulled off the line entering the IP, and turned the key to engage lift pump. It started pushing fuel but with pretty low pressure, like a weak stream just dripping out. Seems to me like it should be pushing a solid stream of fuel...
    Any reccomendations on pumps for these engines?

    Cheers
    Where the line picks up fuel in the tank, the pickup tube. It may be clogged

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