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Cat Stolen - Straight pipe installed and now sputtering badly

Discussion in '1st Gen. Tacomas (1995-2004)' started by Sippi, Apr 11, 2010.

  1. Apr 11, 2010 at 9:14 AM
    #1
    Sippi

    Sippi [OP] Well-Known Member

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    Yes my cat was stolen off my 98 2.7 4x4, so instead of purchasing a 900 toyota cat from the stealership I had a straight pipe installed. The rear 02 sensor bung was removed when they sawed off the cat.

    I know the sputtering is due to the 02 sensor not connected but even if I have a muffler shop do the job for me I will still run into codes. Even worse my truck will continue to sputter.

    So I am writing to see if anyone has had a similar experience and what are some measures I can take to handle this.

    I have read about the dummy 02 sensors but I wanted some feedback from some members that have had this issue and resolved it.

    Thanks,

    Sip
     
  2. Apr 11, 2010 at 11:03 AM
    #2
    h_curtis

    h_curtis Well-Known Member

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    If mine was stolen, I would get a high quality catalytic converter that has the proper receiver and plug it back in. I am sure there is a way to mess about doing something different, but you are dealing with lots of things here. Engines are designed from the factory to have a certain amount of back pressure not to mention the cat's sensor was giving the computer information so it adjusts several things to make the truck run efficiently. Back in the day, you could rip a cat off and mess around with a host of things so easily. If you are running a stock motor with no mods, then to me your are not going to get a good result.
     
  3. Apr 11, 2010 at 11:08 AM
    #3
    desertdude59

    desertdude59 CRAZY 4WHEELER

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    From the Mojave desert now in Wild and Wonderful W
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    4" lift after market front bumper bed mount lightbar/roll bar (4)6" kc's on the roll bar (2) kc flat back bumper mounts f/r gears for the 33's
    I agree. The cat is more for smog, but that o2 is part of the engine management system. I'd get that fixed or you might be buying a new engine.
     
  4. Apr 11, 2010 at 11:20 AM
    #4
    stenyeart

    stenyeart Well-Known Member

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    Get an aftermarket one from a local auto parts store. Get one that is made for your vehicle so it has the right mount for the O2 sensor. I am sure you could pick one up for around $200. I am not a big fan of the dummy O2 sensors, I have tried them before and it is not the same as stock. Spend the money and fix it right so you dont have problems down the road.
     
  5. Apr 11, 2010 at 1:12 PM
    #5
    NickJ*97756

    NickJ*97756 Well-Known Member

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    i had a magnaflow high flow cat installed at a local shop for $180. Gave it a better tone too.
     
  6. Apr 11, 2010 at 2:29 PM
    #6
    Sippi

    Sippi [OP] Well-Known Member

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    Thanks guys for the responses...
     
  7. Apr 14, 2010 at 7:54 AM
    #7
    Sippi

    Sippi [OP] Well-Known Member

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    Pompano Beach, Fl
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    So I checked my codes today and here is what is going on (Via AutoZone)

    - P0125 - Insufficient coolant temp for closed loop
    - Fuel Control
    Possible causes include: Faulty Thermostat, Low Coolant Level, Faulty ECT


    - P0171 - Air/Fuel Mixture System Lean Bank 1
    Possible Causes Include: Low Fuel Pressure, Faulty MAF/VAF sensor, Cylinder Misfire Condition, Faulty H02S/AF Sensor, Large Vacuum Leak

    I cleaned the MAF sensor with electrical contact cleaner earlier today and it seemed to help in the beginning. After a few minutes of driving it started again to sputter. I barely nursed her home at the end of the drive.
     
  8. Apr 14, 2010 at 7:58 AM
    #8
    GSRON

    GSRON Well-Known Member

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    The front O2 sensor will affect the running of the vehicle.
    The rear O2 sensor is there to check if the Cat is working. It has no effect on how the engine runs.

    Fix the first code and get the engine up to temp so it goes into closed loop. then check for vacum leaks.
     
  9. Apr 14, 2010 at 8:07 AM
    #9
    NraFan

    NraFan Join the NRA! Protect your freedom!

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    Power sliding doors baby! WooHoo!
    Who would steal a cat? They are a pain the ass. Scratching, biting, all that fur. Ohhhh, I see now.
     
  10. Apr 14, 2010 at 8:14 AM
    #10
    Sippi

    Sippi [OP] Well-Known Member

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    I loved my kitty too...

    Damn thief
     
  11. Apr 14, 2010 at 8:20 AM
    #11
    98tacoma27

    98tacoma27 is gooder 'en chicken Moderator

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    Check you fluid level, then check your thermostat by placing it in 185° water. It should open and then begin to close as it cools down. If those check good, then replace the ECT. If you replace the ECT, DO NOT PUT TEFLON TAPE ON IT.

    The 171 means you need to clean your MAF with electronic or MAF cleaner. Becareful as it is fragile.
     
  12. Apr 14, 2010 at 10:04 AM
    #12
    Toph

    Toph Addicted to V8s

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    I had a 240sx a few years ago and removing the rear 02 sensor made the rest of the sensors throw codes for some reason, so I just plugged it back in even though it wasn't in the exhaust system anymore and the codes went away.
     
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