No fuel after head gasket replacement

Discussion in 'Prius v Care, Maintenance and Troubleshooting' started by Jenkem_Enjoyer, Dec 12, 2025 at 8:28 PM.

  1. Jenkem_Enjoyer

    Jenkem_Enjoyer New Member

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    As the title says, I just replaced the head gasket in my 2014 Prius V, with apx 275k. I've done several had gasket replacements, although this is my first on a prius. Everything went well (I thought) and seemed to go back together A-OK. Trying to start and I'm getting the following codes P300 (Multiple Cylinder Misfire) P301 (Cylinder 1 Misfire) P302 (Cylinder 2 Misfire) & P219A (Air-Fuel Ratio Imbalance).

    I can hear the fuel pump running when I open the door or try to turn on the car. Suspecting that I was not getting fuel to the rail, I popped open the connector on the fuel line and it was bone dry; nothing coming out. I initiated the fuel pump (tapping brakes) and nothing came out.

    I've done a lot of digging online, and I'm not finding anything. Do you need to prime or flood the fuel rail? If so, how?

    Thanks in advance.
     
    #1 Jenkem_Enjoyer, Dec 12, 2025 at 8:28 PM
    Last edited: Dec 12, 2025 at 8:37 PM
  2. Mendel Leisk

    Mendel Leisk MMX GEN III

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    That sounds like the brake booster.
    Cylinder one and two are “traditional” head gasket failure points. Maybe the head/block interface warped? With 275k miles, it could could have had head gasket failure for sometime; they can fail as early as 150k.

    EGR cleaned?

    the misfire codes need an extra zero btw: it’s P0301, for example.
     
  3. BiomedO1

    BiomedO1 Senior Member

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    The filter sock on your fuel pump intake may be clogged; so you'll have to pull it to check. I would check the fuel pump fuse and relay first.
     
  4. rjparker

    rjparker Tu Humilde Sirviente

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    I don't think I have ever heard the fuel pump running on my v.

    First things first

    1. Do you get Ready when trying to start?

    2. Does the engine spin when pressing the gas in Ready?

    3. Do you know what the Brake Booster whine sounds like when opening the door after sitting overnight?

    4. If you get Ready and the engine seems to start on gas pedal, how long does it spin as the high voltage cranks it using a motor generator?

    5. Are you sure you opened up the fuel rail?

    Most problems starting after a head gasket job are mass flow sensor unplugged, pcv unplugged or other vacuum line disconnected.