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Replacing 2-wire OPSU with 3-wire

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  • #1

    Question : Replacing 2-wire OPSU with 3-wire

    While swapping a 1994 Camaro 3.4L into my 1981 Chevette I busted the 2-wire oil pressure sending unit. I have a known-good 3-wire OPSU that I would like to wire up in its place.
    I've googled without luck for this info, anybody have the specifics for this?
    sigpic
    "It's your car. Do with it what you wish, but as you enter this unknown world you will need to invent the wheel all over again. For the adventurous and those that are backyard mechanics who have nothing but time you might like this. Most have plenty of frustrating moments and the process usually takes significantly longer then what anyone could imagine. The end result of this conversion is completely up to you." - Jon McCullough of BMCautos.com
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  • #2
    404 Not Found
    http://60degreev6.com/content.php/199-Heated-O2-Sensor-Install
    -Brad-
    89 Mustang : Future 60V6 Power
    sigpic
    Follow the build -> http://www.3x00swap.com/index.php?page=mustang-blog

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    • #3
      Thanks Brad, but that's for heated oxygen sensors.
      I'm referring to the oil pressure sending unit, like this one.
      sigpic
      "It's your car. Do with it what you wish, but as you enter this unknown world you will need to invent the wheel all over again. For the adventurous and those that are backyard mechanics who have nothing but time you might like this. Most have plenty of frustrating moments and the process usually takes significantly longer then what anyone could imagine. The end result of this conversion is completely up to you." - Jon McCullough of BMCautos.com

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      • #4
        Wow, duh... Was reading it on my phone why watching something on TV, and just saw 2-wire to 3-wire and assumed O2. Sorry....
        -Brad-
        89 Mustang : Future 60V6 Power
        sigpic
        Follow the build -> http://www.3x00swap.com/index.php?page=mustang-blog

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        • #5
          That's ok, thanks for trying to help though.
          sigpic
          "It's your car. Do with it what you wish, but as you enter this unknown world you will need to invent the wheel all over again. For the adventurous and those that are backyard mechanics who have nothing but time you might like this. Most have plenty of frustrating moments and the process usually takes significantly longer then what anyone could imagine. The end result of this conversion is completely up to you." - Jon McCullough of BMCautos.com

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          • #6
            scooter, how is a 3 wire opsu better than a 2 wire? Does the pcm get a signal with the 3 wire or something?

            93 Firebird 3.4
            Pacesetter Headers, Flowmaster 80, Comp 1.6 RR,Cloyes 2x Set, P&P Heads & Intakes, Custom Cam, Holley FPR, Ram Air Intake, Posi Rear w/3.42's & Disk Brakes.
            Cam and Heads by 60Inclusive.com

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            • #7
              The way I understand it is that the 3-wire OPSU can send a signal to both the PCM and the gauge... but the real reason is to save some money.
              I already have a good 3-wire OPSU, might as well use it if I can
              sigpic
              "It's your car. Do with it what you wish, but as you enter this unknown world you will need to invent the wheel all over again. For the adventurous and those that are backyard mechanics who have nothing but time you might like this. Most have plenty of frustrating moments and the process usually takes significantly longer then what anyone could imagine. The end result of this conversion is completely up to you." - Jon McCullough of BMCautos.com

              Comment

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