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EFI fuse blows when I try to start my pickup.

Discussion in '2nd Gen. Tacomas (2005-2015)' started by Jimkana, Sep 6, 2012.

  1. Sep 6, 2012 at 9:17 AM
    #1
    Jimkana

    Jimkana [OP] Member

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    I drove from Washington to Alaska and I made it all the way up without a problem and I go to start my pickup up and it won't fire. I checked all my fuses and my EFI fuse keeps blowing out. I googled my problem and I saw a bunch of stuff about O2 sensors causing the problem but I disconnected them all and it still won't start and blows fuses so I put a small piece of stainless wire in the fuse slot and it gets red hot when I turn the ignition. All the O2 sensors seemed to be ok and nothing was melted like I kept reading about so now I'm out of ideas and wondering if anything else can cause that problem. I have a 2006 V6.
     
  2. Sep 6, 2012 at 9:27 AM
    #2
    dexterdog

    dexterdog My pee parts itch

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    Time to replace the fuel pump.
     
  3. Sep 6, 2012 at 9:35 AM
    #3
    achirdo

    achirdo First Class White Trash

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    Checked for chewed up wires under the Hood maybe.
     
  4. Sep 6, 2012 at 9:38 AM
    #4
    BlazeTaco

    BlazeTaco Well-Known Member

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    Never bypass a fuse unless you want to burn you truck up or spend major money replacing burned up wires and electrical parts. You will cause way more damage then there was to begin with.
     
  5. Sep 6, 2012 at 5:07 PM
    #5
    Jimmyh

    Jimmyh Well-Known Member

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    If you leave that stainless steel wire in there you are going to have a lot of melting going on. Pull it out and locate the short circuit.
     
  6. Sep 6, 2012 at 5:16 PM
    #6
    landphil

    landphil Wishin' I was Fishin'

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    Not so hasty! Sure, try unplugging the connector, or pulling the relay, but throwing parts at it without proper testing is a sure way to empty some pockets.
     
  7. Sep 6, 2012 at 8:03 PM
    #7
    dexterdog

    dexterdog My pee parts itch

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    I am pretty confident this is the issue as I have seen it numerous times. Yes, I wouldn't recommend "throwing parts" at a problem and that is not what I am saying as none of us are there to physically examine the problem. My recommendation is take it to a mechanic and get it fixed but be prepared that it is most likely the fuel pump.
     
  8. Sep 7, 2012 at 5:53 PM
    #8
    Jimkana

    Jimkana [OP] Member

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    I checked all my fuel lines and I'm still getting fuel to the engine so I traced the problem all the way to the injectors I think. I just can't figure why that fuse is blowing and all my O2 sensors still have the heat shrink tubing on them with no marks.
     
  9. Sep 7, 2012 at 6:01 PM
    #9
    triumphx

    triumphx Well-Known Member

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    Are you running a trd s/c by chance? If so then it's due to the power for the coolant pump, if not I'm not too sure
     
  10. Sep 7, 2012 at 7:37 PM
    #10
    92dlxman

    92dlxman drinking whats on sale

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    i cant see how this would happen without crossed wires or a bad voltage regulator, which i guess to be incorporated into the alternator. whats up with all the electrical issues lately, im scared



    wheres Bama Toy? seriously i think he could help
     
  11. Sep 7, 2012 at 8:06 PM
    #11
    joes06tacoma

    joes06tacoma Well-Known Member

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    http://www.ncttora.com/fsm/05+/data/ileaf/06toyewd/06toypdf/ewd/2006/tacoma/h/em01d3.pdf

    Some wiring info, if it helps.

    I doubt it's the fuel pump, that should be switched through a relay and fused separately. Double check me, but I'm almost 100 percent on that.

    Does the efi fuse blow when the key is turned to the "on" position? Or only after you crank it over? That might help narrow it down. If it's an injector, that may not be energized before cranking it over.

    Also, I notice there is an efi fuse and an "efi 2" fuse.....which one is it?
     
  12. Sep 8, 2012 at 10:56 AM
    #12
    Jimkana

    Jimkana [OP] Member

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    It blows when I turn the key to the on position and it's the EFI fuse not the EFI 2. That's a good point about the injectors not getting energized when the key is just in the on position I didn't think about that.
     
  13. Sep 8, 2012 at 11:06 AM
    #13
    joes06tacoma

    joes06tacoma Well-Known Member

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    Okay, I will correct myself here. The efi fuse does feed the fuel pump. Looking at the schematic, if you pull the fuel pump relay out and try again, that will eliminate the fuel pump as the cause of the blown fuse.
     
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