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Need Help with No Fuel Signal

Discussion in '2nd Gen Tundras (2007-2013)' started by Lumpycorn, Jun 5, 2020.

  1. Jun 5, 2020 at 6:39 AM
    #1
    Lumpycorn

    Lumpycorn [OP] New Member

    Joined:
    Apr 30, 2017
    Member:
    #7498
    Messages:
    7
    Gender:
    Male
    Two weeks after installing the Hewitt-tech Gen 1 bypass my truck wouldn't start. I have +12V at the backside of the C/OPN relay but no voltage to the fuel pump. I just replaced the Fuel Pump ECU but still no signal. I guess it's time to pull the fuse box. Any other ideas?


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  2. Jul 13, 2020 at 3:21 PM
    #2
    revtune

    revtune New Member

    Joined:
    Mar 5, 2019
    Member:
    #27132
    Messages:
    610
    Gender:
    Male
    First Name:
    Dane
    Houston Texas
    Vehicle:
    2006 Tundra 4.7 AC 2wd
    2006 Tundra: Stock air intake 3 inch catback Magnaflow 13742 2.5 inch front lift 1.5 inch rear blocks 2014 sr5 4Runner wheels (17x7) 1.5 inch hub centric wheel spacers p285/70/17 Nitto Terra Grappler G2 Weathertech floor liners
    What did you end up doing?
     
  3. Jul 18, 2020 at 9:37 AM
    #3
    Lumpycorn

    Lumpycorn [OP] New Member

    Joined:
    Apr 30, 2017
    Member:
    #7498
    Messages:
    7
    Gender:
    Male
    It ended up not being the fuel pump. I have fuel to the rail but no start. I tried replacing the computer but that didn't work. So I'm thinking the EFI relay but I don't know where it is at on the vehicle, it's not in the main relay box. It's grayed out on the diagram so I don't know if that means optional or internal to something. Not much info on it.


    upload_2020-7-18_12-34-27.jpg
     

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