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Thread: Help needed diagnosing Weber 40 IDA 3C problem

  1. 08-21-2022, 06:41 PM #21
    Bob Schaefer
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    Thanks for the suggestions addressing my request for help, guys.

    As I said before, it’s not clear how soon I’ll get to investigate the problem further (due to travel, birthday and family commitments). But when I do, I’ll report back …
    Bob Schaefer

    ‘67 911S Canary/Lemon yellow, sunroof coupe produced w/100L tank. Until determined otherwise, 306943S appears to be 1 of 1, and among the earliest 911’s with a 100L tank. The 911’s initial participation in a competitive event, the 1965 Monte Carlo Rally, was fitted with a 100L tank (#300055). Seeking additional info on earliest 100L tank fitments to 911’s.



    ‘70 914/6 (2.7l RS spec engine, but searching for 6404915 original)
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  2. 09-19-2022, 12:28 PM #22
    Bob Schaefer
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    Quote Originally Posted by 1QuickS View Post
    I remain suspicious of the Webers having ingested a bit of debris on either one or more idle air correction jets or on an emulsion tube. Partial throttle would demand fuel delivery through these components but WOT is main circuit only. I have personally experienced these two scenarios, a bit of rust from air cleaner blocked an idle air correction jet and another time a bit of paper towel blocked a small section of one emulsion tube and both times I had WOT to redline but troubled partial throttle operation.

    ...
    You nailed it Paul! Thanks so much for your help.
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    Bob Schaefer

    ‘67 911S Canary/Lemon yellow, sunroof coupe produced w/100L tank. Until determined otherwise, 306943S appears to be 1 of 1, and among the earliest 911’s with a 100L tank. The 911’s initial participation in a competitive event, the 1965 Monte Carlo Rally, was fitted with a 100L tank (#300055). Seeking additional info on earliest 100L tank fitments to 911’s.



    ‘70 914/6 (2.7l RS spec engine, but searching for 6404915 original)
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  3. 09-19-2022, 02:38 PM #23
    1QuickS
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    Congratulations! Not the air correction jet I was thinking about but it is at least an air correction jet.

    Easy fix!
    Paul Abbott
    Early S Member #18
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  4. 09-19-2022, 03:20 PM #24
    edmayo
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    Is that a tree limb caught in there? Thanks Bob for finishing the thread, not everyone does,,,,and chalk up one for Paul
    Early S Registry member #90
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  5. 09-23-2022, 05:35 AM #25
    Bob Schaefer
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    Quote Originally Posted by edmayo View Post
    Is that a tree limb caught in there? Thanks Bob for finishing the thread, not everyone does,,,,and chalk up one for Paul
    Oddly, it looked like a piece of aged / soiled clear silicon caulking that had been applied to a cover / gasket surface.
    Bob Schaefer

    ‘67 911S Canary/Lemon yellow, sunroof coupe produced w/100L tank. Until determined otherwise, 306943S appears to be 1 of 1, and among the earliest 911’s with a 100L tank. The 911’s initial participation in a competitive event, the 1965 Monte Carlo Rally, was fitted with a 100L tank (#300055). Seeking additional info on earliest 100L tank fitments to 911’s.



    ‘70 914/6 (2.7l RS spec engine, but searching for 6404915 original)
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