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99 3.4L Bog/No Power HELP!

Discussion in '1st Gen. Tacomas' started by Guyskie, Apr 25, 2011.

  1. Apr 25, 2011 at 7:14 AM
    #1
    Guyskie

    Guyskie [OP] Member

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    Atlanta
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    08 DC Sport 4X4
    Trying to help a fellow Tacoma owner is distress. His 99 3.4L 5spd manual completely bog's and almost and sometimes does stall when any throttle is applied. The truck is unable to drive at all. Any help/suggestions to try would be greatly appreciated! The check engine light has not been triggered either which I find odd for the truck running so poorly.

    New Fuel pump installed
    Checked spark plugs
    Checked PCV for vacuum
    disconnected catalytic conv to rule out being clogged
    checked for various vacuum leaks

    What else?
     
  2. Apr 25, 2011 at 9:28 AM
    #2
    tacomaman06

    tacomaman06 Carolina Alliance: Lead, follow, or get the hell o Staff Member

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    Will
    York,South Carolina
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    '13 Silverado ext cab
    Try cleaning your maf sensor and check the butterfly in the tb to make sure its opening all the way.
     
  3. Apr 25, 2011 at 5:38 PM
    #3
    scocar

    scocar being weird again....still

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  4. Apr 25, 2011 at 6:05 PM
    #4
    mike92y

    mike92y Well-Known Member

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    Michael
    Gilbert AZ
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    OME all around. TRD Supercharger. MIsc stuff.
    My 97 3.4L was only getting around 17mpg. So I invested in an ultra gage. I had two trouble codes but the CEL was not on. I think the perhaps the previous owner had disconnected this to pass inspection in PA. I cleaned the MAF reset the truck with the ultra gauge and the trouble codes came back. Replace O2 bank 1 sensor 1, reset the truck and now I get 18-19 mpg in the city and no trouble codes. So you may want to hook this truck up to a thingy magangy at your local auto parts store and see what it says. Hope I helped.
     
  5. Apr 25, 2011 at 6:44 PM
    #5
    Guyskie

    Guyskie [OP] Member

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    Forgot that we swapped out the TPS sensor with a new one. TPS was not the culprit either.
     
  6. May 2, 2011 at 7:01 AM
    #6
    Guyskie

    Guyskie [OP] Member

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    08 DC Sport 4X4
    Ended up being a dirty MAF. Runs like a champ now. Its amazing that two little sensing wires being dirty would cause such havoc!
     
  7. May 2, 2011 at 8:52 AM
    #7
    scocar

    scocar being weird again....still

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    OME 881s, Dakars, greasable shackles, Nitrocharger sports, extended exhaust hanger, BAMF BPV relocate, Wheeler's extended brake line, rear diff breather mod, swaybar removed, Pilot backup lights, Redline hood struts, 4Runner 5-stars, Hidden Hitch Class III, 7-pin marine-grade wiring
    :woot:Will for the win!

    Glad it was so simple. Apparently, this should be item #1 on the trouble-shooting list for these symptoms.
     
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