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Thread: anyone have specs for primary and secondary coil - black bosch on 89 525i

  1. #1
    Join Date
    Dec 2010
    Posts
    34

    Default anyone have specs for primary and secondary coil - black bosch on 89 525i

    trying to ohm out my coil as a possible culprit for hard cold start , anyone have specifications?

  2. #2
    Join Date
    Apr 2006
    Location
    Chicago, Il. U.S.A.
    Posts
    4,243

    Default

    primary 500ohms +/- 10%
    secondary 6k ohms =/- 10%
    "The gas pedal wouldn't go to the floor if it weren't meant to be there"

  3. #3
    Join Date
    Dec 2010
    Posts
    34

    Default

    actually that is what I found in Bently and that is in error. I contacted Bosch directly and they told me that the primary is .5 Ohms , not 500 . Saved me from buying a coil!

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