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truck feels like it bumps forward

Discussion in 'Technical Chat' started by yotasrock, Feb 12, 2012.

  1. Feb 12, 2012 at 12:12 PM
    #1
    yotasrock

    yotasrock [OP] I love tacos

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    when im at a stop light only once every so often it happens, and im stopped for like 10 sec. the truck will bump froward with brake pressed down??? has his happen to any one? kinda like it shift gears from park to drive but much stronger. tacoma 4.0 v6 prerunner
     
  2. Feb 12, 2012 at 1:33 PM
    #2
    MWink

    MWink Pavement Pounder

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    mine kinda does that. i sometimes wonder if my foot comes off the brake a little bit. idk what it could be
     
  3. Feb 12, 2012 at 1:49 PM
    #3
    agrant2312

    agrant2312 Well-Known Member

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    Nicholasville, KY
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    Intake, Flowmaster Exhaust
    My truck does it only when a/c or defrost is on. Just the compressor kicking on and off. Know exactly what you mean.
     
  4. Feb 12, 2012 at 1:51 PM
    #4
    Khaos

    Khaos Big Member

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    Its a known characteristic of the vehicle, its from the A/C compressor turning on and off.

    Why is this in the build folder?
     
  5. Feb 12, 2012 at 1:55 PM
    #5
    brett1586

    brett1586 Well-Known Member

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    Mine does it too.
     
  6. Feb 12, 2012 at 1:58 PM
    #6
    MountainEarth

    MountainEarth Well-Known Member

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    X3. Keep in mind the compressor kicks on and off in both defrost modes, even if the A/C isn't on.
     
  7. Feb 12, 2012 at 2:33 PM
    #7
    Eagledynasty

    Eagledynasty The White Knight

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    Yeah this happens to me every once in awhile. Nothing big. Feels like my truck is ready to run :D


    Good question haha. Accidental probably
     
  8. Feb 12, 2012 at 8:46 PM
    #8
    yotasrock

    yotasrock [OP] I love tacos

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    thanks all,
    im at ease now i have the 100000 mi warranty with 97000 on the meter and they want me to pay like 100 something to check it out.
     
  9. Feb 12, 2012 at 8:48 PM
    #9
    Jerez

    Jerez SoCal LED Dash Swap

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    all tacomas tend to do that....its pretty much only happens when the a/c compressor kicks in and it feels like it goes forward even with the foot down on the brake :cool:
     
  10. Feb 13, 2012 at 7:07 AM
    #10
    TIMMAAY

    TIMMAAY Member

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    Mine started doing it the day I put my wheels and tires on, went from stock to 32 inch. I think it has something to do with changing the gear ratio due to new size tires and computer controlled shift points.
     
  11. Feb 13, 2012 at 7:14 AM
    #11
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    I think it's more the truck/tranny downshifting into first than the compressor. Notice there's no manual guys in here.
     
  12. Feb 13, 2012 at 7:24 AM
    #12
    DEEVON911

    DEEVON911 Semi-Pro

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    :notsure: Always assumed mine was due to compressor kicking on. Because thats the only time it does it on my truck. Maybe combo of both little more load on the engine, and trans dropping into 1st.
     
  13. Feb 13, 2012 at 12:01 PM
    #13
    Yota Toy

    Yota Toy Taco Sauce

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    Mine does this sometimes, with the A/C off. It happens when I coast to a stop. I am sitting there when there is a sudden "lurch", almost feels like someone ran into the back of the truck very slowly. I drive an auto. I am starting to believe that when I coasted to a stop it stayed in second gear, then after a slight delay it engaged first and that it what I am feeling.
     
  14. Feb 13, 2012 at 1:37 PM
    #14
    TIMMAAY

    TIMMAAY Member

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    ABSOROOTRY
     
  15. Feb 14, 2012 at 3:49 AM
    #15
    yotasrock

    yotasrock [OP] I love tacos

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    ya thats how it feels thanks
     
  16. Feb 14, 2012 at 5:52 AM
    #16
    Trent

    Trent Well-Known Member

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    Agreed. Sometimes that gear change kicks like a mule, too. At least it does on mine.
     
  17. Feb 14, 2012 at 6:08 AM
    #17
    jmf300

    jmf300 Member

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    Haven't had to run the AC yet since getting my taco. I drove a standard for 7.5 years so the first time it did it i thought someone rolled up and hit me as well. But after it doing it a few times i think it comes from stopping to fast and the tranny catching up to slow? But jmo definately no taco experience here i've only had it for 2 months.
     
  18. Feb 14, 2012 at 6:13 AM
    #18
    kroving

    kroving Well-Known Member

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    +1
     
  19. Feb 20, 2012 at 9:28 AM
    #19
    Doc35

    Doc35 Well-Known Member

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    My wife's 2005 Camry does it too.
     
  20. Feb 20, 2012 at 9:32 AM
    #20
    OffroadToy

    OffroadToy This ain't Dodge City, and you ain't Bill Hickok

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