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HELP. identify this wire/sensor? PLEASE

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    #1

    HELP. identify this wire/sensor? PLEASE

    I've got an intake manifold leak...getting ready to order some parts and I found this. It's hanging under the front of the intake manifold. It's labeled bosch 17173739287. I called BMA and it's not a valid part #. Maybe a knock sensor or something...it looks like it's broken at the end...

    thanks in advance

    oh yeah...88 325ix if it matters

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    #2
    Well, there is a line that comes out from under the throttle body... could this piece of wire just been a plug that somebody hacked in there? It almost looks like a cut off ignition wire to me...

    There are not any knock sensors on the M20, so that can't be it.

    And no, Bosch part numbers do not match up with BMW numbers so back-tracking it that way isn't going to work.
    1987 E30 325is
    1999 E46 323i
    RIP 1994 E32 740iL
    oo=[][]=oo

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      #3
      Your fuel return hose looks to be in poor condition. Mine looked like that and started leaking from right downstream of the connector. As for the original question, I currently have my manifold off, and I haven't seen anything like what you have pictured hanging around. Is the other end connected? If so, to what?
      The current fleet:
      1992 325ic: 148k-171k miles
      1999 Chevrolet Tahoe LT 4WD, 114k-142k miles
      1984 MasterCraft Stars and Stripes Powerslot (not a car :D) PCM Ford 351W, 904 hours

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        #4
        not sure where the other end is? looks like it goes into a harness. guess I'll wait until I have the manifold off to figure it out.

        yeah, I planned on replacing a few vacuum/fuel lines while I had it apart. thanks for the heads up though

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          #5
          alright so I got my intake manifold gaskets replaced...along with a new timing belt. the tensioner was bad and had let the belt rub against the timing cover...it was halfway gone!

          anyway the wire in the first picture comes from under the round diagnostic plug in the picture. one of the wires/plugs is for the crank sensor. what's the other wire/plug supposed to go to????

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            #6
            The two sensors that connect under the diag plug are the CPS and the Cylinder ID. (The cylinder ID is part of the #6 spark plug lead.)

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              #7
              beat me to it, i was gunna say the same thing: inductive pickup sensor for the #6 spark plug wire.

              '89 Alpine S52 with goodies

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                #8
                Originally posted by jmc1590 View Post
                The two sensors that connect under the diag plug are the CPS and the Cylinder ID. (The cylinder ID is part of the #6 spark plug lead.)
                yep, that's definitely what it is, spark plug cylinder ID.

                so it times the injector cycle...without it all injectors fire at the same time. otherwise they fire in pairs. so I guess I need to replace this only for MPG sake???

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