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3 wire O2 sensor needed!

Discussion in 'The Garage' started by George_Pimpdaddy, Sep 18, 2006.

  1. George_Pimpdaddy

    George_Pimpdaddy 1/2 ton status

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    k i have heddman hedders and new dual exhaust with 40's exiting behind the rear tires its 2.5". now i need to put my O2 in before i start to drive it more so whats my options ive read about the 3 wire O2's from like an s10 works?? if you guys know what i need and a part number or something would be great thanks
     
  2. mr.smartass

    mr.smartass 1 ton status Premium Member

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    AFS-74 is the delco number for the 3 wire o2 sensor, i'm running it, works great.
     
  3. George_Pimpdaddy

    George_Pimpdaddy 1/2 ton status

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    thanks also would napa would have it?
     
  4. opfor2

    opfor2 1/2 ton status

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    YES!!! I just bought a Bosch 3 wire O2 sensor from them on Saturday it was like 49.00 with my AAA discount. I'm going to be doing the 3 wire O2 sensor upgrade on my 90 K-5 soon also.
     
  5. George_Pimpdaddy

    George_Pimpdaddy 1/2 ton status

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    where do the extra wires go?
     
  6. mr.smartass

    mr.smartass 1 ton status Premium Member

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    one to your o2 sensor wire, one is hot and one is ground. make sure the hot is run to power with ign.
     
  7. George_Pimpdaddy

    George_Pimpdaddy 1/2 ton status

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    thanks makes sense
     
  8. jamber2541

    jamber2541 1/2 ton status

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    most 3 wire are the same size, any auto parts store should have them. the black wire is signal wire the two white wires are your ground and your ignition, the 02 sensor does not care what wire (white) goes where as long as one is ground and the other is ignition
     
  9. dyeager535

    dyeager535 1 ton status Premium Member

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    The Delco's come highly recommended, the Bosch's don't. I woouldn't/won't ever go the Bosch route myself.
     
  10. opfor2

    opfor2 1/2 ton status

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    I just asked this question in another thread about the Bosch O2 sensors and why they weren't recommended and no one really came up with a reason why not to use them. What I've read the Bosch makes numerous O2 sensors for the OEM's so I guess they couldn't be that bad. I wouldn't even be surprised if the AC Delco sensor was made by them.

    Dan..
     
  11. dyeager535

    dyeager535 1 ton status Premium Member

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    http://coloradok5.com/forums/showthread.php?t=172595&highlight=bosch+o2

    http://www.thirdgen.org/techboard/diy-prom/104834-730-will-not-stay.html?highlight=bosch+ground

    The real answer is somewhere in the archives over at diy-efi.org, but it isn't just heresay. I spent some time trying to find it, but the only thing I could find in a cursory search was the ground issue, not the exact explanation, but I've seen it before.

    Bosch made the '85-89 MAF sensors for the F-bodies (at least) and they still work, but it doesn't mean the problems with the O2 sensors aren't real. Lots of parts anymore on domestics are Bosch.
     
  12. jamber2541

    jamber2541 1/2 ton status

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    I have read (this site or another) that the Bosch spark plus are not that great, but I dont remember anything bad on the 02 sensors
     

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