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Oxygen Sensor

Discussion in 'The Garage' started by Chris87K5, Dec 3, 2002.

  1. Chris87K5

    Chris87K5 1/2 ton status

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    Ok, I just got new headers and I want to put a 3 wire O2 sensor in when I install the headers. Does anybody have a part number for them. I went to napa but they told me that I they couldn't give me one because all thier computer shows is a single wire one. /forums/images/graemlins/confused.gif
     
  2. chillywilly

    chillywilly Registered Member

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    Not being a smart arse,but why u lookin for 3 wire?Do you want to preheat your o2? If so just get an o2 for a 96 newer truck big bucks tho compared to a single wire.
     
  3. Chris87K5

    Chris87K5 1/2 ton status

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    yeah because I'm getting a code 42 (I think) and I have heard that this will solve the problem
     
  4. 87sm465np208

    87sm465np208 1/2 ton status

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    well im sorry dude, but these trucks, like mine i have a 350tbi in my truck, i did the o2 sensor replacement on my truck, it was 18.99$ at auto zone, i dont see a neeed for you to get a pricey one, unless you have a newer motor that needs it. but our engines only take a 1 wire one. /forums/images/graemlins/thumb.gif

    /forums/images/graemlins/usaflag.gif /forums/images/graemlins/truck.gif
     
  5. 87sm465np208

    87sm465np208 1/2 ton status

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    and code 42, is the electric spark timeing, not the o2 sensor, a code 14 will be the O2 sensor, code 42 means somethin is wrong with your HEI /forums/images/graemlins/eek.gif. good luck /forums/images/graemlins/thumb.gif

    /forums/images/graemlins/usaflag.gif /forums/images/graemlins/truck.gif
     
  6. Chris87K5

    Chris87K5 1/2 ton status

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    Its code 44 not 42 i was wrong. 44 is lean exhaust right? I also have a code 24 and 43 if anybody can help with those. /forums/images/graemlins/frown.gif
     
  7. BurbinOR

    BurbinOR 3/4 ton status

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    GM Computer Codes

    3 wire O2 sensors ARE a good idea. Heats them up sooner in winter and allows the truck to go into closed loop sooner. /forums/images/graemlins/laugh.gif
     
  8. TopOff

    TopOff 1/2 ton status

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    I would try and go through the different years until you find one that has a 3 wire.

    Good luck.

    For some weird reason my Howell TBI unit has a four wire O2 sensor. Howell said "everything" is compatible with an 89 TBI truck. I know it's not, but oh well.
     
  9. jc71355

    jc71355 1/2 ton status

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    I was told P/N AFS74 (AC Delco) or 25312179. Stock on a 4.3L. You may want to double check it though I have not done this for myself although I plan to eventually. Also, be sure you soder the wire on the o2 sensor so your getting a correct reading and if your sensor is behind your collector make sure you don't have any leaks.
     

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