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Thread: Coil Issue?

  1. 05-12-2013, 07:44 AM #1
    vicrola
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    Coil Issue?

    What are the signs that the coil is going bad?

    Vic
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  2. 05-12-2013, 08:22 AM #2
    69Sman
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    I don't think they 'go bad.' They either work or don't.
    Bahia Red '72 911S
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  3. 05-12-2013, 09:12 AM #3
    blucille
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    They often get flakey only when hot, so loss of spark, massive misfire, or no running when really warmed up
    looking for 1972 911t motor XR584, S/N 6121622
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  4. 05-12-2013, 09:25 AM #4
    Mr9146
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    Quote Originally Posted by sonett43 View Post
    They often get flakey only when hot, so loss of spark, massive misfire, or no running when really warmed up
    As a supplement:

    The CD box is more prone to produce these symptoms when hot than the coil; however, most often it's the "not running" symptom.

    And, I've seen more bad CD boxes than I've seen bad black Bosch coils ... the silver Bosch coils are another matter altogether.
    Last edited by Mr9146; 05-12-2013 at 11:06 AM.
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  5. 05-12-2013, 10:32 AM #5
    Chuck Miller
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    I agree with Marco... original black coils have VERY long life cycles........

    Although I do keep a spare in the car.......
    Chuck Miller
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  6. 05-13-2013, 03:17 AM #6
    vicrola
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    Thanks guys...
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