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tacoma running bad... HELP

Discussion in '2nd Gen. Tacomas (2005-2015)' started by stockton, Dec 12, 2008.

  1. Dec 12, 2008 at 3:30 PM
    #1
    stockton

    stockton [OP] Member

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    My tacoma lost a lot of its power.
    It is a 2000 with v-6 and manual trans.
    It has 99,600 miles

    I took it into autozone where they plugged it into the diagnostics computer and this is the results.
    1) mass air flow sensor
    2) oxygen sensor
    3) Air Intake Temperature sensor
    4) cylinder mis-fire on cylinder #1
    5) cylinder mis-fire on cylinder #2
    6) cylinder mis-fire on cylinder #3

    When idling it misses and chuggs, as in vroom-vroom-vroom... it is not constant at all.
    When going down the road it will fire in all cyinders when the rpms are between about 1500 and 2200, but above that and it misses again.
    Also, when I hit the gas it sounds like it is gasping for air.... it is not a hissing sound like a vaccum leak it is more like a deep hollow sound, and no has power. It will sputter a bit and it will go, but it will go best when I slowly accelerate.
    Top speed is about 65mph on a level road.

    I Changed the spark plugs and fuel filter about 4 months ago.
    2 days ago I pulled the plugs to see if any are fowled, but they are all clean and from the color they are buring quite well, not fowled, no carbon, no oil... just clean buring plugs
    I just replaced the air filter 3 days ago.

    I replaced the MAF sensor today (dec 12th, 2008) and it did not do any good.

    I thought I would change the oxygen sensor next, but there are two and I don't know which one to replace or if I have to replace both.

    As for an air intake temperature sensor, I can't find that, and autozone does not carry one.

    Autozone suggested I replace the coils, but where it is running fine between about 1500 and 2200 rpm's I would say they are just fine.

    Common sense and the fact that one thing leading to another tells me that the mis-firing is happening because an incorrect fuel-air ratio, so once that is fixed, the mis-firing should go away.

    Any ideas or suggestions?
    I need to get it running, but don't want to pour hundreds of dollars into parts that are just fine.

    Thanks in advance.

    Branden
     
  2. Dec 12, 2008 at 3:46 PM
    #2
    jhodge83

    jhodge83 Any dog under 50# is a cat and cats are useless... Moderator

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    wat?
    not sure about the issue, but definately the wrong section of the forum
     
  3. Dec 12, 2008 at 3:49 PM
    #3
    tcBob

    tcBob Gringo Bandito Moderator

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    moved to 2nd gen forum.
     
  4. Dec 12, 2008 at 3:57 PM
    #4
    jhodge83

    jhodge83 Any dog under 50# is a cat and cats are useless... Moderator

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    wat?
    needs to be in 1st gen, almighty bob
     
  5. Dec 12, 2008 at 4:07 PM
    #5
    stockton

    stockton [OP] Member

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    Thanks for moving it...
     
  6. Dec 12, 2008 at 4:27 PM
    #6
    jefferson

    jefferson needs to stop cruising Buy/Sell/Trade....

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    sounds like a headgasket..
     
  7. Dec 12, 2008 at 5:46 PM
    #7
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    Being as there is a misfire on cylynders #1 #2 #3, I dont think its a head gasket. Cylinders #1 and #3 are the first two on the passenger side, while Cylinder #2 is the first one on the driver side. Have you checked your coil packs to make sure they are connected propperly?
     
  8. Dec 12, 2008 at 7:14 PM
    #8
    stockton

    stockton [OP] Member

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    Thanks for the response Chris,

    Yes, I have checked the coil packs... I checked them when I pulled all 6 spark plugs a few days ago. All coil packs are connected correctly.

    Like you said cylinders 1, 2, and 3 are not on the same side so a bad head gasket does not sound correct. At the same time since it fires just fine when the RPM's are between 1500 and 2200, I don't think it is the coils either... if they were hooked up wrong or not firing correctly it would not matter what the RPM's were at it would still miss.

    Thanks for the thoughts though.
     
  9. Dec 12, 2008 at 7:19 PM
    #9
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    What about the fuel injectors? Maybe you could run some sea foam thru it? Im mostly thinking "out loud" trying to find an answer for this problem...:confused:
     
  10. Dec 12, 2008 at 7:22 PM
    #10
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    What about the fuel injectors? Maybe you could run some sea foam thru it? Im mostly thinking "out loud" trying to find an answer for this problem...:confused:
     
  11. Dec 12, 2008 at 7:42 PM
    #11
    stockton

    stockton [OP] Member

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    I have not checked the injecters, but that is a good idea... I will have to check tomorrow.
     
  12. Dec 12, 2008 at 7:57 PM
    #12
    HighPlains

    HighPlains Well-Known Member

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    Could it be sticky intake valves? They only have to hang up a little for something like this to be experienced. Timing perhaps? What color are the spark plugs when you pulled them out?
     
  13. Dec 12, 2008 at 8:02 PM
    #13
    jps76

    jps76 Member

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    3" revtek lift, 33" bfgs, piaa fog lights, more to come...
    this link is for a 2000 service manual that should help you troubleshoot some of the parts that you suspect without having to change them

    http://haroldmiller.net/FSM/2000/
     
  14. Dec 12, 2008 at 8:48 PM
    #14
    stockton

    stockton [OP] Member

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    the plugs are the normal color... slightly brownish, not black, or fowled in anyway.
     
  15. Dec 12, 2008 at 8:50 PM
    #15
    stockton

    stockton [OP] Member

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  16. Dec 12, 2008 at 10:42 PM
    #16
    HighPlains

    HighPlains Well-Known Member

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    Brown is good. Mixture is right on if they are a tan-brown color.
     
  17. Dec 16, 2008 at 11:48 AM
    #17
    stockton

    stockton [OP] Member

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    Just wanted to let all of you know what the problem is. Bad news.... the timing belt slipped so the timing is off.

    Thanks for all of your thoughts.

    Branden
     
  18. Dec 16, 2008 at 12:29 PM
    #18
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    Wow. Wouldnt have thought that. Any damage done?
     
  19. Dec 16, 2008 at 1:33 PM
    #19
    eye one

    eye one Well-Known Member

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    Good to hear you found the problem. I thought the V6 had a timing chain? How does that slip?
     
  20. Dec 16, 2008 at 2:09 PM
    #20
    stockton

    stockton [OP] Member

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    no damage. Just need to replace the timing belt and water pump... the water pump is leaking and antifreeze is dripping on the belt, which is probably why the belt slipped.
     
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