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Please help me, truck acting funny when I'n drive and on the brake.

Discussion in '1st Gen. Tacomas (1995-2004)' started by 17hmrtaco, Dec 16, 2011.

  1. Dec 16, 2011 at 5:35 AM
    #1
    17hmrtaco

    17hmrtaco [OP] Active Member

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    Here's what she's doing I hope someone can help, alright this only happens sometimes more often than not, when my taco an 03 4wd four door v6 3.4L 139,000 miles is stoped at a red light, or just stoped with my foot on the brake and the truck in drive it will act like it's gunna kill it drops rpms enough to feel it struggle then its fine it will do that once or twice maybe more then it will stop. It runs fine starts fine everything is 100% but the red light problem, what iv been doing is when I get to a red light I just put it in neutral and it's all good like that. Can someone please help!!
     
  2. Dec 16, 2011 at 5:39 AM
    #2
    sprocketdog

    sprocketdog Well-Known Member

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    Could have something to do with the brake booster?
     
  3. Dec 16, 2011 at 6:06 AM
    #3
    wesrunner

    wesrunner Team 4Runner

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    X2...

    What your describing sounds like the way mine was acting when I pulled the vacuum line off my booster to do my seafoam.

    Maybe start there... :confused:
     
  4. Dec 16, 2011 at 6:15 AM
    #4
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    If it were the booster it would do it in neutral too. Sounds like a tranny issue to me.
     
  5. Dec 16, 2011 at 6:30 AM
    #5
    17hmrtaco

    17hmrtaco [OP] Active Member

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    Thats when it started when I pulled the vacuum line off to seafoam my truck. How did you fix yours of did it just stop
     
  6. Dec 16, 2011 at 6:39 AM
    #6
    17hmrtaco

    17hmrtaco [OP] Active Member

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    What kind of tranny issue, like fuid to low or something
     
  7. Dec 16, 2011 at 6:44 AM
    #7
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    Disregard that. If it started when you did the seafoam treatment, then that is where problem lies
     
  8. Dec 16, 2011 at 6:51 AM
    #8
    sprocketdog

    sprocketdog Well-Known Member

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    I am taking it is an Auto trans? If so may be the torque converter is going bad?
     
  9. Dec 16, 2011 at 7:09 AM
    #9
    17hmrtaco

    17hmrtaco [OP] Active Member

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    Yeah auto trans it's never given me any trouble until I did the seafoam idk what could of happened or how I can fix it
     
  10. Dec 16, 2011 at 7:33 AM
    #10
    17hmrtaco

    17hmrtaco [OP] Active Member

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    What could be the problem with the vacuum line? Loose or something not creating a good enough seal or what I'm not 100% on how it really works and how it effects the motor
     
  11. Dec 16, 2011 at 7:39 AM
    #11
    sprocketdog

    sprocketdog Well-Known Member

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    Please disregard this post.
     
  12. Dec 16, 2011 at 7:40 AM
    #12
    sprocketdog

    sprocketdog Well-Known Member

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    How long did you let the seafoam in for? Did you have the motor at operating temp before you induced it into the system? Did you only use 1/3 of the bottle? How long did you let the truck sit after you shut it off with the seafoam in it?
     
  13. Dec 16, 2011 at 8:22 AM
    #13
    17hmrtaco

    17hmrtaco [OP] Active Member

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    A couple of seconds. Yes it was at operating temp. It was a little more than 1/3 of the bottle. Like 10 min maybe less.
     
  14. Dec 16, 2011 at 8:23 AM
    #14
    17hmrtaco

    17hmrtaco [OP] Active Member

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    I did the seafoam like 6 months ago maybe longer and it's been getting worse since
     
  15. Dec 16, 2011 at 8:38 AM
    #15
    Madjik_Man

    Madjik_Man The Rembrandt of Rattle Can

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    Throttle position sensor?

    When it was malfunctioning on my truck it would idle too high when I was stopped.

    I've been told it could also has the reverse effect: idle too low when stopped.
     
  16. Dec 16, 2011 at 9:02 AM
    #16
    17hmrtaco

    17hmrtaco [OP] Active Member

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    Where is that sensor located? And it only does it sometimes
     
  17. Dec 16, 2011 at 9:03 AM
    #17
    17hmrtaco

    17hmrtaco [OP] Active Member

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    Is there any way to increase the idle speed?
     
  18. Dec 16, 2011 at 9:06 AM
    #18
    sprocketdog

    sprocketdog Well-Known Member

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    DR coilovers, Camburg UCAs, Dakar rear springs, Bilstien 5150s, Demello sliders, rear plate bumper w/ swing gate, and alot more mods. [IMG]http://i1216.photobucket.com/albums/dd368/sprocketdog1/059.jpg[/IMG]
    On the side of the throttle body, there is a test you can do on it using an OHM meter I believe.
     
  19. Dec 16, 2011 at 2:02 PM
    #19
    17hmrtaco

    17hmrtaco [OP] Active Member

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    Could a bad positive battery terminal cause this I just checked it and it's completely shot I don't know how my truck was starting
     
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