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INFO FOR FLEX FUEL HARD START/ALCOHOL DENSITY ISSUES OWNERS

Discussion in '2.5 Gen Tundras (2014-2021)' started by BTBAKER, Dec 31, 2021.

  1. Dec 31, 2021 at 1:09 PM
    #1
    BTBAKER

    BTBAKER [OP] BE YOU. THE WORLD WILL ADJUST.

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    I took my truck in for the second time in 52,000 miles for hard starts and lower fuel economy. The first time a flash of the ECM and setting the density back to normal fixed the issue. I figured the same was happening this time.

    The alcohol density percentage was jacked again. But, they also told me I need to have my fuel pump replaced and that would apparently fix the issue. There is a TSB for 2019 plus. They are changing mine under some emissions act that runs for 8 years or 96,000 miles. They never mentioned this to me the first time. Toyota probably has told them if the issue persists they will cover a new pump. The advisor said Toyota has no answer to make this permanently go away other than replacing the pump. They ordered one and will call when in.

    The tech also told me to always remove the key from ignition when fueling. I guess with key in the computers are active and when putting in fuel it can confuse the ECM. I guess I’ll try to remember that.

    Anyway, for those with the hard start issues, talk to your advisor and ask about getting the pump replaced. It will hopefully solve the hard start issue.
     
  2. Jan 14, 2022 at 6:19 PM
    #2
    BTBAKER

    BTBAKER [OP] BE YOU. THE WORLD WILL ADJUST.

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    My fuel pump finally gave up. For those with flex fuel trucks know that the ECM sends incorrect fuel/air ratios to the pump. This causes hard starts and eventually a burned up fuel pump.
    The biggest issue is that TOYOTA has no answer for the ECM issue. Basically, it’s gonna happen again.
    I’m really down in Toyota right now. I now have a truck that will eventually eat another fuel pump and possibly stall the engine when driving.
    FYI for you hard start Toyota owners.
     
  3. Jan 14, 2022 at 6:23 PM
    #3
    BTBAKER

    BTBAKER [OP] BE YOU. THE WORLD WILL ADJUST.

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  4. Jan 14, 2022 at 6:28 PM
    #4
    TRDProLife

    TRDProLife LETS GO BLUES

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    Happened to me too. The first time they flashed the ECM.
    The second time fuel pump.
    Always happened in the winter. Not sure if that's just a coincidence or not.
     
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  5. Jan 14, 2022 at 6:38 PM
    #5
    BTBAKER

    BTBAKER [OP] BE YOU. THE WORLD WILL ADJUST.

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    Same. Has it been good since?
     
  6. Jan 14, 2022 at 6:39 PM
    #6
    BTBAKER

    BTBAKER [OP] BE YOU. THE WORLD WILL ADJUST.

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    It pisses me off that they can’t even find a solution.
     
  7. Jan 14, 2022 at 6:52 PM
    #7
    TRDProLife

    TRDProLife LETS GO BLUES

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    It's been good so far. But it hasn't even been a year. So crossing fingers. I didn't know it was a common problem. I thought it was just a fluke.
     
  8. Jan 14, 2022 at 6:53 PM
    #8
    TRDProLife

    TRDProLife LETS GO BLUES

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    Now I'm wondering if a tuner of some sort will help?
     
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  9. Jan 14, 2022 at 8:27 PM
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    texmln

    texmln New Member

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    They won't be spending any time looking for a solution. They've moved on. They will be occupied 100% of the time going forward solving turbo problems. In a few years they'll be responding to both turbo problems and a flood of complaints from customers who want to know why their turbo truck engines only last half as long as NA versions.
     
  10. Jan 14, 2022 at 10:18 PM
    #10
    BTBAKER

    BTBAKER [OP] BE YOU. THE WORLD WILL ADJUST.

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    I don’t know but if it does I’m in.
     
  11. Jan 15, 2022 at 10:16 AM
    #11
    Toney198

    Toney198 New Member

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    Thanks to this forum I was made aware of this TSB, I just purchased my truck and the first time it was cold, it took 3 cycles to start, thought someone had got one over on me. Took it to the local dealer, they claimed it showed to have done at the factory so it could not be preformed. I asked them how exactly it was done at the factory when the TSB came out years after my truck was made. They ended up waiving the 150 to reset it and its back to normal for now. I was also getting on average 13.5 MPG, maybe this will help as well, I have not put a full tank through it since the fix.
     
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  12. Jan 15, 2022 at 10:30 AM
    #12
    BTBAKER

    BTBAKER [OP] BE YOU. THE WORLD WILL ADJUST.

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    Keep records. The general direction this will go is they reset the ECM fuel ratio the first time. It will help for a while. But, it will more than likely come back and at that point it’s a new pump. Good luck.
     

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