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found the problem

Discussion in '1st Gen. Tacomas (1995-2004)' started by 98yota, Jan 13, 2008.

  1. Jan 13, 2008 at 8:12 PM
    #1
    98yota

    98yota [OP] Mean Green Machine

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    Marion, VA
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    4WD Timberland Mica taco
    CAI, gutted cat, bed cover.
    well guys, i found the problem to my rattling valves and the backfire is b/c of the downstream (behind the cat) O2 sensor. idk much about these except that they read exhaust gases and send back to the ECU for correct air/fuel mixture? i think anyways lol correct me if im wrong on that. is it possible just to clean one of these sensors? i mean if theres anyway to avoid buying a 130 dollar sensor, i need to know. plus its still dirty when we went muddin a few months back...i know it sits inside the exhaust but could this affect it? help and advice is greatly appreciated.
     
  2. Jan 14, 2008 at 3:58 AM
    #2
    sslongmuir

    sslongmuir Well-Known Member

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    Custom rock sliders
    i just replaced the front o2 sensor for 106$. carquest. I think its a bad place to try to skimp because it can screw up all kinds of things. Mine was telling me that there was insufficent engine temp because the sensor didnt read the EGT and told it it was cold and dumped the fuel to it. Id play it safe and replace both and not have to worry about it. I kinda figure toyota engineers might know a little more aobut this stuff than us so it there for a reason
     
  3. Jan 14, 2008 at 5:38 AM
    #3
    Janster

    Janster Old & Forgetful

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    The O2 sensor is more than a sensor....
    Here's a scan I took out of my 96 service manual. The last paragraph in paticular....
    [​IMG]

    Bank 1 Sensor 2 is the sensor after the CAT and that's the easier one to replace.

    Try calling Conicelli Toyota - online prices are pretty good. Tell them you're from TTORA. I think they'll still doing discounts for them..atleast, that's what I used to do.
    http://conicellitoyota.com/partznet.aspx

    Also - you can call around to get prices from dealers and then call your local dealer back and say "I found it at XXX price online" and sometimes they'll honor that price for you.
     
  4. Jan 14, 2008 at 7:50 AM
    #4
    98yota

    98yota [OP] Mean Green Machine

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    CAI, gutted cat, bed cover.
  5. Jan 14, 2008 at 8:09 AM
    #5
    humanoid

    humanoid bite me

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  6. Jan 14, 2008 at 3:00 PM
    #6
    98yota

    98yota [OP] Mean Green Machine

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    Marion, VA
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    4WD Timberland Mica taco
    CAI, gutted cat, bed cover.
    alright, but if i buy the denso for the back, will that screw up the upstream O2 sensor?
     
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