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Thread: Ignition issue RS clone, 2.7 CID

  1. #1

    Ignition issue RS clone, 2.7 CID

    Hello all,

    When it happened; cleaning up the chassis harness

    Decided not to start:crancks, fuel pump running, and fuel at the engine.

    Removed lead from the distributor cap, checked for spark again ground (engine case) , decided to spark, reinstalled, its started. Great. While running (20 seconds ish), I reached in to disconnect the gas pedal from the stem, when it released, I bumped the throttle forward, and the wires with my shoulder. Now it wont start again.

    I need to trouble shoot the ignition system, see if I mistakenly cut/loosened a ground or power wire, or any wire that would effect the system.

    I looked at the coil, and it has 2 stud wire plug, and the coil is indicating A B i had my neighbor crank and i checked for voltage one by one, but no reading. Not sure if one is power and the other is ground.

    Thoughts
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  2. #2
    Senior Member
    Join Date
    Oct 2010
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    Southern Ca.
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    848
    Not really a question for the early S registry , there is no longer anything early S about your ignition .

  3. #3
    Quote Originally Posted by Richy View Post
    Not really a question for the early S registry , there is no longer anything early S about your ignition .
    Fair enough. Problem solved. Incase another guy has a 2.7 CIS swap, The wire at the fuse was pushed in and the set screw was contacting the wire insulation and not powering up the high voltage exciter box/transformer/ignition controller, or what ever you want to call it.

    Maybe not be an early ignition, but still and early Porsche. Back to pelican.

  4. #4
    Senior Member 2.5MFI's Avatar
    Join Date
    Sep 2006
    Location
    Bend, Oregon
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    398
    Thanks for the trouble shooting info Rex. Good information for all. Glad you found the problem.
    Mark Jung
    MFI Werks
    Early 911S Registry #972
    Carrera T w/LWB, MT, RWS, PCCB
    72 T 66 x 100 MFI Twin Plug Coupe
    R Gruppe #686

  5. #5
    Senior Member Haasman's Avatar
    Join Date
    Apr 2011
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    N.Calif., south of SF
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    1,834
    Glad you fixed your problem. Your posting of:

    Fair enough. Problem solved. Incase another guy has a 2.7 CIS swap, The wire at the fuse was pushed in and the set screw was contacting the wire insulation and not powering up the high voltage exciter box/transformer/ignition controller, or what ever you want to call it.
    Reminded me that a couple years ago I had a couple of seemingly weird electrical things ..... went through the screw-down connectors at the fuse box. Everything seems good after that. Probably not a bad idea with these 40+ years cars.
    Last edited by Haasman; 10-17-2021 at 02:34 PM.
    Haasman

    Registry #2489
    R Gruppe #722
    65 911 #302580
    70 914-6 #9140431874
    73 911s #9113300709

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