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FFV problems!!!!

Discussion in '2nd Gen Tundras (2007-2013)' started by fouronereason71, May 14, 2015.

  1. May 14, 2015 at 7:52 AM
    #1
    fouronereason71

    fouronereason71 [OP] New Member

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    I have taken my truck to the dealership twice now for scheduled maintenance and after both times within about 300 miles I start getting the same symptoms as an owner of a 2012-13 with flex fuel gets, hard start and spitting and sputtering under load. I believe its a big coincidence because the dealer is about an hour away and we usually fill up at a station that we normally dont. The first time it happened I took it in and they said a PVC hose had "come off" and charged me $99. The 2nd time I WAS HOT, took it back and test drove it with the tech to replicate the missing under load, he hooked up his scantool and the alcohol % was 41. He reset it and now its fine, for now. My research on line leads me to believe I'm having the same issues but toyota wont fix it because its a 2011. Couple questions, #1 How did he reset the alcohol density, is it something I can do? #2 Can the 2012-14 reflash be done on mine 2011? The dealership wants me to pay $900 for a new fuel pump but I really dont see that being the problem if every dang gone FFV is having the issues and a reflash will fix it. Thanks
     
  2. May 14, 2015 at 8:27 AM
    #2
    Mike

    Mike Tread lightly.

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    yep bank account is running low from it..
    First thing is first here are using solely e85? if you are QUIT using it. With the 41% mix your having major problems and i dont blame the Ecm..

    Course of action here is quit using e85 go back to 87 ron fuel .. Where you live at they have no idea what they are doing with e85 at the terminals (trust me i know).

    for your questions now

    1: all you can do is disconnect the battery for about 10 mins. touch the + and - together for about 10 seconds so the caps drain and ecm is set back to factory. The ecm must relearn idle all over again.

    2: Reflashing toyota ecms is like pulling teeth from someone who doesn't have teeth. unless the stock numbers are the same from the 2011 to the 2012 your wasting your time. trust me.

    your dealer wants to replace the pump because the sensor for ffv is in the tank that tells the ecm if has e85 in the tank. That sensor can go bad tho i have never seen one go out.

    All that said go back to using normal fuel 87 thru 93 what ever you like and stay away from yellow fuel see if it clears up first.
     
    Last edited: May 14, 2015
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  3. May 14, 2015 at 8:42 AM
    #3
    Tonka007

    Tonka007 New Member

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    Man, that's what I call knowledge....I feel even better about this forum now
     
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  4. May 14, 2015 at 8:57 AM
    #4
    fouronereason71

    fouronereason71 [OP] New Member

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    I'm sorry I should of put that in there, I only run 91 octane, and usually from the same gas station but maybe once a month we travel up to the big city for groceries, lol. How would anybody know if the numbers were the same for the pcm's, from my experience with the dealer here they are over paid lube tech's so any info from them is non existent. Ive researched the heck out of the internet only to find a whole lot on the 2012 and up models. Is the alcohol density sensor pat of the fuel pump?
     
  5. May 14, 2015 at 9:12 AM
    #5
    Mike

    Mike Tread lightly.

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    yep bank account is running low from it..
    If your only running 91 octane or ron and NO E85 and your having that kind of alcohol density problem two things here come to mind off the top of my head. One bad fuel in the tanks below ground ( it does happen) change fuel stations there tanks may have something wrong under ground. Two FFV sensor has failed some how and giving the Ecm false information. Yes the FFV sensor is right beside the fuel pump in the tank.

    Now to check the ecms for year all you have to do is call dealer ask them if the part numbers are the same from 2011 to 2012. I have a feeling they are NOT. Dealer might be able to tell you if you can use a 2012 ecm in a 2011. some trucks you can like in my tacoma for example its a 95.5 but i can use a 97 ecm so i can put a supercharger on it.
     
  6. May 14, 2015 at 9:22 AM
    #6
    fouronereason71

    fouronereason71 [OP] New Member

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    Thank you very much, my thought was that one gas station we get gas from once a month or less was causing the problems because we'd get gas there then go get the oil changed and then start having problems. I will call the dealership and find out if the pcm's are the same. I love my truck but dont want a sour taste in my mouth over this, thanks again!!!!
     
  7. Jan 9, 2016 at 6:39 AM
    #7
    Miguel.mejia2

    Miguel.mejia2 My Earth Mover!!!

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    Hi guys am new to this forum, i been doing alot of digging but maybe over thinking as well. I can say I just experienced the alcohol density problem on my 2015 Tundra. Very very disappointed on the way it was starting. Dealer Forman Technician had a good conversation with me about the flex fuel system in the Tundra. He stated after completely filing up with gas and hitting the road it is best not to jump on that pedal. Mind you I told him I dont do that. Anywho he said after taking off from fueling allow 15 mins of normal driving to give the flex fuel alcohol density sensor to calibrate. That's after every fill up, he stated that I should not have that issue happened again. After he cleared what he saw was 87 alcohol density reading when it should have been at zero. They did set it back to the normal state.

    Am really hoping this issue doesn't happened again. But I was thinking I had a bad fill up just can't remember were. Good news is my truck did start saving more gas after he reprogrammed my truck to normal state and feels real solid. Is anyone else having theses issues with a new 2015 Tundra?
     
  8. Jan 9, 2016 at 7:46 AM
    #8
    Fitz19d

    Fitz19d New Member

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    Some other more recent threads here or on tundratalk, its been an issue for years. There's a more recent flash/service bulletinends in 600 that's supposed to work pretty well for most so far. I had bad start and kinda sluggish lack of power for a bit, but last week even at 15degrees been fine. So intermittent for me, prompt have alcohol reading high but not enough to notice. But under warranty so will get it done at my next service.
     
  9. Jan 10, 2016 at 10:47 AM
    #9
    TruckyTruck

    TruckyTruck New Member

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    The new program ending in 600 will fix all of your ffv woes.
     
  10. Jan 10, 2016 at 11:01 AM
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    KCDuran

    KCDuran New Member

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    Stupid question.. Sorry about your frustrations OP... but our trucks will say flex fuel right? It's just not a given..
     
  11. Jan 10, 2016 at 11:16 AM
    #11
    mdavis

    mdavis Tiger Life

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    Two ways to tell, one is the gas cap will say E85 and the second is the fifth letter in the VIN. If it's a W it is a FFV.
     
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  12. Jan 10, 2016 at 11:31 AM
    #12
    KCDuran

    KCDuran New Member

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    :yay:not me ... haha thanks for the info davis!
     
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  13. Feb 9, 2016 at 1:30 PM
    #13
    pdrhound

    pdrhound New Member

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    so i have a FFV bought 3 days ago. runs fine with 4000 miles. do i need to run to the dealer and get a fix, or think about it if i have a problem? Is it just a computer programming difference. I will never use E85 but we see 10% here all winter long. hits my tacoma for about 7% decrease in MPG
     
  14. Feb 9, 2016 at 4:55 PM
    #14
    matluth

    matluth Fish On!

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    18"X9" FN BFD's rims, 295/70R/18E Cooper Discoverer STT Pro's, upgraded to Old Man EMU coil-overs/shocks. Toytec shackles Next: true dual exhaust, new UCA's.
    Your Tundra has a 5.7L with 381 hp stock and weighs a couple more pounds than a Taco and 4.3 :1 rear gears. Should be no surprise. Your are lucky to have only a 7% decrease in mpg. (But you have a 100% increase in awesomeness.) I like the trade off.
     
  15. Feb 9, 2016 at 6:46 PM
    #15
    Sean266

    Sean266 #ThinBlueLine Staff Member

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    You can call the dealer, provide them ur VIN# and they can see if there's an flash update for it.
     
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