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

    Joined:
    Wednesday
    2
    1
    0
    Location:
    spokane wa
    Vehicle:
    2014 Prius
    Model:
    V
    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

    Joined:
    Oct 17, 2010
    60,264
    41,463
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    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.
     
    #2 Mendel Leisk, Dec 13, 2025 at 5:54 AM
  3. BiomedO1

    BiomedO1 Senior Member

    Joined:
    Mar 27, 2021
    3,623
    1,872
    0
    Location:
    SacTown, Ca
    Vehicle:
    2021 Prius Prime
    Model:
    LE
    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.
     
    #3 BiomedO1, Dec 13, 2025 at 9:42 AM
  4. rjparker

    rjparker Tu Humilde Sirviente

    Joined:
    Jun 6, 2008
    10,156
    6,313
    7
    Location:
    Texas Hill Country
    Vehicle:
    2012 Prius v wagon
    Model:
    Three
    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.
     
    #4 rjparker, Dec 13, 2025 at 1:57 PM
  5. Jenkem_Enjoyer

    Jenkem_Enjoyer New Member

    Joined:
    Wednesday
    2
    1
    0
    Location:
    spokane wa
    Vehicle:
    2014 Prius
    Model:
    V
    1) the Ready light on the Ignition Button starts green then turns orange.

    2) The engine does not spin

    3) I realized, what i thought was the fuel pump, was the brake booster.

    4) Engine doesn't spin

    5) I'm 100% positive.

    Thanks


     
    #5 Jenkem_Enjoyer, Dec 15, 2025 at 8:59 PM
    Mendel Leisk likes this.
  6. Mendel Leisk

    Mendel Leisk MMX GEN III

    Joined:
    Oct 17, 2010
    60,264
    41,463
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    I know (from personal experience :unsure:) a disconnected PCV hose at intake manifold will prevent engine start up. And that’s so easy to miss. There may be similar.
     
    #6 Mendel Leisk, Dec 16, 2025 at 5:35 AM
  7. rjparker

    rjparker Tu Humilde Sirviente

    Joined:
    Jun 6, 2008
    10,156
    6,313
    7
    Location:
    Texas Hill Country
    Vehicle:
    2012 Prius v wagon
    Model:
    Three
    The Ready light is on the dash and says "Ready". It's not the power button.

    No Ready - no engine spin - no start.

    I would check the brake pedal causes the brake lights to turn on and would check the 12v to ensure at least 12.0 volts.

    IMG_1013.jpeg IMG_1014.jpeg IMG_1015.jpeg
    IMG_1016.jpeg IMG_1017.jpeg

    If there was a momentary reverse polarity jump the engine fuse box's internal 125a fuse may be blown.
     

    Attached Files:

    #7 rjparker, Dec 16, 2025 at 7:52 AM
    Last edited: Dec 16, 2025 at 7:57 AM
(You must log in or sign up to post here.)