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2012 Toyota Tundra Starter Problems

Discussion in '2nd Gen Tundras (2007-2013)' started by pailwriter, Nov 8, 2018.

  1. Nov 8, 2018 at 5:33 PM
    #1
    pailwriter

    pailwriter [OP] New Member

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    I have a 2012 Toyota Tundra 5.7L that is having starter problems.

    If the pickup sets for about 8 hours or longer, the starter doesn’t disengage properly.

    I try starting it, and it turns the engine but the engine won’t start right away, and when I turn the key back to the “run” position, the starter keeps spinning until I turn the key to the off position.

    Sometimes the starter will keep spinning until the engine starts while the key is in the “run” position. Sometimes I have to try this 2 or 3 times. When it does start, it revs up to a very high RPM for a while. Much higher than normal.


    Once I get it started and drive it for a while, then turn it off, it will start right up like normal.


    A work around I have found is to put the key in, turn it the run position and let it set there till it finishes with all 5 dings (those little bell/chime noises that all cars do) then I give it just little gas (mash the gas pedal) as I start it.

    I also pulled the negative battery cable off for about 45 minutes to reset the computer. This helped with the above “delay” trick and it no longer revs up real high.


    However, this is a “work-around”, and I would really like to solve the real problem.

    The pickup is 6 years old but only has 54,000 miles on it.


    Any advice would be greatly appreciated.
     
  2. Nov 8, 2018 at 5:37 PM
    #2
    T-Rex266

    T-Rex266 Moderator Staff Member

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    Almost sounds fuel related. It’s not getting gas until you mash the pedal; forcing more fuel into the lines.
     
  3. Nov 8, 2018 at 5:43 PM
    #3
    pailwriter

    pailwriter [OP] New Member

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    Thank you for your reply.
    I read about that on other forums, some said they changed the battery, fuel pump etc with no change/improvement.
    Some say the throttle body needs cleaning, but I haven't found anyone with this issue that has posted a real fix or even the reason for the problem.
     
  4. Nov 20, 2018 at 5:19 PM
    #4
    pailwriter

    pailwriter [OP] New Member

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    Update:

    I seem to have figured out a work-around.

    After doing the process listed above, (disconnecting the battery cable and turning the ignition to the “run” position until all bells finished ringing) I also switched to “premium” gas (91 octane) for two full tanks.

    This seems to have helped. About a quarter of the way through the second tank of “premium” gas, it started clearing up. Meaning that now it starts like normal without having to wait a long time with the ignition in the “run” position and I no longer have to pump the gas pedal to get it started.

    I can stand outside the pickup, reach in through the window and start the pickup with no hesitation even when it has sat for more than 8 hours.

    I still fill like this is just a work-around and would really like to know what the real problem is and how to repair it properly.

    So, if anybody knows the answer to this question, please post here and I will spread the word as much as I can.

    Thank you.
     
  5. Nov 20, 2018 at 6:05 PM
    #5
    T-Rex266

    T-Rex266 Moderator Staff Member

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    Maybe it’s just bad fuel
     
  6. Nov 20, 2018 at 6:08 PM
    #6
    TheBeast

    TheBeast The Beach

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    still running original battery too ?
     
  7. Nov 20, 2018 at 7:26 PM
    #7
    pailwriter

    pailwriter [OP] New Member

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    not sure. I bought this pickup May this year. So i don’t know how old the battery is.
     
  8. Dec 9, 2018 at 9:12 AM
    #8
    pailwriter

    pailwriter [OP] New Member

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    Update regarding the battery question. Yes, it has a new battery in it and still doing the same thing.
     
  9. Dec 10, 2018 at 6:27 AM
    #9
    FXFormat

    FXFormat New Member

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    This sounds like a fuel delivery issue, i'd start with that first... weak fuel pump or bad gas, run some fuel injector cleaner through the next tank and see if it helps.
     

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