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Thread: Ignition issue RS clone, 2.7 CID

  1. 10-14-2021, 08:00 AM #1
    Rex1968s
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    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 won’t 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. 10-15-2021, 06:54 PM #2
    Richy
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    Not really a question for the early S registry , there is no longer anything early S about your ignition .
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  3. 10-15-2021, 07:34 PM #3
    Rex1968s
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    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.
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  4. 10-17-2021, 06:36 AM #4
    2.5MFI
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    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
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  5. 10-17-2021, 12:55 PM #5
    Haasman
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    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

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