What is this plug for?

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  • BeirBrennerE30
    R3VLimited
    • Oct 2003
    • 2740
    #1

    What is this plug for?

    I searched but cant find anything. When I did the s52 swap I just unplugged the 2 wires that went to this plug and everything ran fine so I kinda forgot about it. What is it for? I cant find anything reasonable in the ETM.

    Its the hex next to the power distribution block with the 2 terminals sticking out in the pic. Its on the passenger side of the engine bay. The stock m20 had 2 wires from the engine harness connecting to it... its been unplugged for almost a decade and I havnt noticed anything not working. Thoughts?

    e30sport.net
    '86 325es - s54b32tu - 6-speed - Mtech 1
    '89 325is - m20b25 - 5-speed - Individual​
    '06 M3 Competition - 6-speed
    '19 Porsche GT3 RS - 7-speed PDK
    '94 Lancia Delta HF Integrale EvoII - Giallo Ginestra
    '97 Range Rover Vitesse
    Tags: None
    • BeirBrennerE30
      R3VLimited
      • Oct 2003
      • 2740
      #2
      I think I answered my own question. It appears to be a temp switch that closes at 32deg for the idle control module. This explains why some e30s I saw didnt have it and also why nothing went wrong when it was left unplugged for 10 years.

      can anyone confirm?
      e30sport.net
      '86 325es - s54b32tu - 6-speed - Mtech 1
      '89 325is - m20b25 - 5-speed - Individual​
      '06 M3 Competition - 6-speed
      '19 Porsche GT3 RS - 7-speed PDK
      '94 Lancia Delta HF Integrale EvoII - Giallo Ginestra
      '97 Range Rover Vitesse

        Comment

        • Jalves619
          E30 Addict
          • Mar 2010
          • 596
          #3
          Nice I was going to make a thread asking the same thing.
          In for the answer.

            Comment

            • Matt-B
              The Waffler
              • Jun 2009
              • 3856
              #4
              wishno parted a car with that, that had m50, was not hooked up


              Please leave feedback below, thanks

              http://www.r3vlimited.com/board/showthread.php?t=358170

                Comment

                • Wishno87
                  R3V OG
                  • Jul 2007
                  • 6025
                  #5
                  It's an eta thing iirc.
                  Your signature picture has been removed since it contained the Photobucket "upgrade your account" image.

                    Comment

                    • Jalves619
                      E30 Addict
                      • Mar 2010
                      • 596
                      #6
                      Does it by any chance connect to this? This runs along the same branch as the main power for the fusebox. It was disconnected when I got the car and the engine harness had already been disconnected so I'm lost as to where it goes. I'm assuming it's another eta thing.

                      Oh and before you ask, I was a hand model for a short time.

                        Comment

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