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Thread: Fuel "check valve" in line? Some clarification?

  1. #1
    Member
    Join Date
    Feb 2018
    Name
    EDWARD
    State
    FL
    Location
    SUNRISE
    Country
    United States
    Posts
    39

    Default Fuel "check valve" in line? Some clarification?


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    Whenever my 4A-GE powered KP61 sits for a while, it takes several seconds for it to start up. The engine spins without the engine starting. When it does start, it sputters for another moment, like all of the gasoline has drained back into the fuel tank. Is there some sort of a check valve in the system? Is there something I need to ad to mine? (My engine and F.I are stock early AE86 parts. I have an aftermarket fuel tank and lines.)
    Can anyone describe to me what failed component I have? If any. Maybe with a photo....
    Thanks

  • #2
    Member
    Join Date
    Jan 2015
    Name
    Dave
    State
    Michigan
    Location
    South Lyon
    Country
    USA
    Posts
    34

    Default


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    The stock Toyota fuel pump has a built in check valve, to prevent drain back in the fuel system. My guess is that you have particles in fuel pump check valve seat area preventing a good seal. l would just crack the fuel line connection at the injector manifold first, to verify that you have loss pressure before jumping in and removing the fuel pump. Which is a real PITA. It could be the cold start injector or sensor. Davew7

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