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Thread: Help disconnecting the cold start system

  1. 02-13-2023, 08:21 PM #1
    Fastissimo
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    Help disconnecting the cold start system

    Hi Everyone. I have a 69 911E and where I live it doesn't get cold enough to need the potentially problematic cold start enrichment system. I would like to remove it to prevent a possible fire from the system spraying fuel at the wrong place or at the wrong time. I've seen a lot of threads discussing how their systems are bypassed through a switch at the dash, or that they are disabled, but not how it's done. Is it as simple as disconnecting the wires on the solenoid? I would prefer to remove the solenoid and cap the hole. Any help would be very much appreciated. Thanks!
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  2. 02-13-2023, 09:04 PM #2
    Fastissimo
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    I should clarify that what I'm trying to disable is the air box fuel spray system. Ideally removing the solenoid so there is no potential for a partially open valve.
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  3. 02-13-2023, 09:08 PM #3
    edmayo
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    just remove the wire from the solenoid. If you really want to you can remove the solenoid and screw in a plug.
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  4. 02-13-2023, 09:27 PM #4
    Fastissimo
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    Thanks Ed! Any chance you know what size plug/thread pitch is needed? No worries if you don't. I can take the solenoid off, measure, and reinstall while I get the plug. Thanks again!
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  5. 02-14-2023, 03:01 AM #5
    SFE
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    here what I've done, disconnected the wire and plugged the pipe with a screw just in case.

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  6. 02-14-2023, 10:21 AM #6
    Fastissimo
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    Thanks, that's probably what I'll end doing so that it can be easily reconnected is someone wants to use it in the future. As a side note, I suggest not using a bolt as a plug. The threads form a continuous channel that usually doesn't seal well. In this case the chances of that hose having fuel pressure are negligible though. Thanks again for taking the time to respond and adding some photos!
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  7. 02-14-2023, 11:14 AM #7
    SFE
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    Quote Originally Posted by Fastissimo View Post
    Thanks, that's probably what I'll end doing so that it can be easily reconnected is someone wants to use it in the future. As a side note, I suggest not using a bolt as a plug. The threads form a continuous channel that usually doesn't seal well. In this case the chances of that hose having fuel pressure are negligible though. Thanks again for taking the time to respond and adding some photos!
    Don't worry this is what I used !

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