Fuel pressure zero

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by GhostmanOn3rd, Nov 20, 2021.

  1. GhostmanOn3rd

    GhostmanOn3rd Junior Member

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    So I bought a non running as is used Prius. Other than bad battery Turns out it also has zero pressure on a fuel guage. I am using my hood HV battery for testing purposes. I Cobbled up some quick connectors and ran a test. It does have the fuel run out code but it will start up and I can hear the engine run but it stops after a couple seconds. I do I back probe the pump to see if it’s got juice?? I have found a lot of mice nests and want to make sure it’s getting power before I buy a tank.
    Thanks!
     
  2. dolj

    dolj Senior Member

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    The car is not really starting. It only sounds like it is as the electric motor is spinning the engine at around 1,000 RPM and stopping when the engine does not fire. You will quickly delete the hybrid vehicle (HV) battery doing this, so get the problem fixed or have an HV battery charger on standby.
    It would seem like a logical thing to test. You could also just apply 12 V for a couple of seconds to the pump plug to see if it runs.

    You could then test the harness connector to see if 12 V was present with the car in IG-ON.
     
    #2 dolj, Nov 20, 2021
    Last edited: Nov 20, 2021
  3. TMR-JWAP

    TMR-JWAP Senior Member

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    Have you tried just adding 5 gallons of gas?
     
  4. GhostmanOn3rd

    GhostmanOn3rd Junior Member

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    I will add 5 gallons of gas when I get home.

    how do i put 12v to the pump?
     
  5. SFO

    SFO Senior Member

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  6. jerrymildred

    jerrymildred Senior Member

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    The Ghostman seems to have ghosted us. I wonder if he got it running.
     
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  7. Raytheeagle

    Raytheeagle Senior Member

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    Hopefully so 'cause that's the only way you make it from 3rd to home(y).
     
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