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  1. #11
    Join Date
    Aug 2006
    Location
    Millington TN
    Posts
    203

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    Only carbureted engines have oil pressure activated switches for the fuel pump. The fuel pump in an EFI engine is controlled by the ECM. There is a small fuse holder with a cover that has three fuses. The fuse holder is attached to the ECM racket near the three relays. One of the fuses is a fuel pump fuse. you need to check it before you do anything else.
    Larry Engelbert
    Indmar Marine Engines
    "Power to the Sport"

  2. #12
    Join Date
    Oct 2013
    Location
    Ft. Collins, CO
    Posts
    687

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    The '07 didn't come with a low pressure pump. Many have added one to help with vapor lock issues.
    2007 Mobius LSV
    1989 Sanger Skier DX - sold

  3. #13

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    Quote Originally Posted by gregski View Post
    The '07 didn't come with a low pressure pump. Many have added one to help with vapor lock issues.
    That explains why I couldn't find it!! I did check all the fuses and relays.. finally gave up and took it to the dealer... I'll post the solution when they call me.
    2007 LSV

  4. #14
    Join Date
    Dec 2018
    Location
    Phoenix AZ
    Posts
    57

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    Did you troubleshoot the tether cord kill switch? On my 06 that switch cuts the fuel pump

  5. #15

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    I have the same issue with no power going to the high pressure fuel pump. Checked relays and can't find any fuses, just circuit breakers with red reset buttons. What am I missing?

  6. #16

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    After a couple of weeks, the dealer called me and quoted me $4k to replace the fuel pump, the ECU and the battery. The fuel pump runs when you connect it directly to a battery, so I don't think its bad. The battery is 2 months old and just needed to be charged.. I told them I'd come pick it up and wasn't paying $4k for them to repair a bunch of stuff that isn't broken. Not sure how to check the ECU, but maybe that's an issue. I did check the little fuses and all the relays mounted on the front of the engine.

    I checked again today, and my meter reads .05v at the fuel pump. That doesn't change when you turn the switch on and it just drops a bit when you crank it. Any advice on what to do next would be greatly appreciated.
    2007 LSV

  7. #17
    Join Date
    Apr 2014
    Posts
    5

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    I had a similar issue with my 1998 Supra. It turned out that I had a bad fuse link feeding the engine electronics with lower voltage. In this situation, the computer didn't have enough power to switch on the fuel pump relay. Before I replaced the fuse link, I got it running by bypassing the fuel pump relay with a short piece of wire. I would suggest checking the fuel pump relay and the voltage at the engine computer. Good Luck!

  8. #18
    Join Date
    Dec 2018
    Location
    Phoenix AZ
    Posts
    57

    Default

    Check the kill switch with your multi-meter. It’s directly inline with the fuel pump

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