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97 Tacoma Poor Engine Performance at high speed

Discussion in 'Technical Chat' started by vhandy, Mar 4, 2010.

  1. Mar 4, 2010 at 5:52 AM
    #1
    vhandy

    vhandy [OP] Member

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    Victor
    Tampa, FL
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    97 Tacoma Ex Cab 4X4
    All, My 97 3.4l Tacoma 4X4 began experiencing poor engine performance at higher speeds (65-75 MPH). A description of the problem is the engine seem to start choking for fuel, and begins to shake. The last incident the check engine light came on and I limped it to my local garage. They ran diagnostics on it and determined that cylindar 5 was mis-firing. The replaced the Ignition coil, wires, replaced the spark plugs, cleaned the fuel intake and air intake sytem. I drove my Tacoma the following day and had the same issue at high speed. Has anyone else had this issue? I've already spend $650 and would prefer not to spend that much again for a simple fix. Thanks for your help.
     
  2. Mar 4, 2010 at 11:23 AM
    #2
    So.Cal Taco

    So.Cal Taco Well-Known Member

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    Jeremy
    So.Cal
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    Total Chaos Long travel Total Chaos Spindle Gussets, Nathan Air Chime K3LA's,Onboard Air system,K&N intake,Chuys 200 plus Amp Alternator,All Pro front Bumper,Lots of Dynamat,99 tacoma Gas Tank Mod ''Secret'' maybe I'll Tell
    check the wires that are grounded to the intake manifold where the diagnostic port is it may be a lose ground i had same prob.
     
  3. Mar 4, 2010 at 2:32 PM
    #3
    kevhogaz

    kevhogaz Low Speed, High Drag

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    Queen Creek, Arizona
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    3" lift front & rear, Air Raid Intake System
    I had the same problem, at about 140K miles. My Mass Airflow Sensor was going bad, and couldn't keep up with the engine at high speeds/rpm's. It also set mis-fire codes, which is pretty common with MAF failure.
     
  4. Mar 5, 2010 at 1:58 AM
    #4
    vhandy

    vhandy [OP] Member

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    97 Tacoma Ex Cab 4X4
    I really appreciate the input. Do you know where the Mass Airflow Sensor is located?
     
  5. Mar 5, 2010 at 5:16 AM
    #5
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    Beech Creek
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    05 Tundra SR5 (+250k AND COUNTING), 88 SR5 PU (SOLD), 98 TRD OR (CRUSHED)
    5100's all on fours
    Next to your air box in the intake tube.
     
  6. Mar 6, 2010 at 4:51 AM
    #6
    vhandy

    vhandy [OP] Member

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    Would you happen to know where I could find instructions on how to replace the sensor?
     
  7. Mar 6, 2010 at 8:11 AM
    #7
    kevhogaz

    kevhogaz Low Speed, High Drag

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    Queen Creek, Arizona
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    SR5 PreRunner
    3" lift front & rear, Air Raid Intake System
    It's as simple as unplugging it, removing the two screws that hold it in, and then reversing the procedure.
     
  8. Mar 6, 2010 at 8:13 AM
    #8
    ktmrider

    ktmrider Senior Member

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    Junk
    also you may want to sea foam your truck
     
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