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Engine running poorly

Discussion in '4 Cylinder' started by 94FlatTracker, Dec 6, 2008.

  1. Dec 6, 2008 at 4:22 PM
    #1
    94FlatTracker

    94FlatTracker [OP] New Member

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    Hagerstown
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    My 1998 Tacoma just started to run poorly this week. I ran the codes and it came up with: TPS/ throttle position malfunction and catylist above threshold bank 1. I replaced the TPS sensor and cleaned the throttle body out, that did nothing, also replaced fuel filter and that did not help. Anyone have any pointers. Im starting to think it may be ignition related. Thanks Curtis Fisk
     
  2. Dec 6, 2008 at 5:14 PM
    #2
    AUDITECH

    AUDITECH Carolina Alliance: LAZY DIVISION

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    charlotte nc
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    none
    do you have a 6 cyl or 4cyl sounds like you might have an o2 sensor that might be going bad. if the o2 sensor is reading wrong you could be running rich or lean.
     
  3. Dec 6, 2008 at 5:17 PM
    #3
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Staff Member

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    He has the 2.7

    OP, Post up the code/s your getting so we can help.
     
  4. Dec 7, 2008 at 7:46 PM
    #4
    piratesvarsity22

    piratesvarsity22 SickTacoFoSho

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    smoked taillights, thrush glasspack muffler, hollowed out cat. K&n intake,2 12' infinity subwoofers. sony xplod cd player
    again same problem. o2 is bad. replace it and watch the difference in gas mileage and performance
     
  5. Dec 7, 2008 at 7:50 PM
    #5
    genxer36

    genxer36 Lord of Tomfoolery

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    Welcome to TW!
     
  6. Dec 7, 2008 at 7:53 PM
    #6
    JJ Customs

    JJ Customs Well-Known Member

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    Not enough to mention on this one. Give me time!
    On my 97 2.7 the TPS went out. The problem I was having was the RPM's would jump up and down at idle. As stated before, the O2 sensor can have the same effect.
     
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