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Thread: MFI troubleshooting - high idle, pops and bucks at part throttle

  1. #121
    Senior Member Simonjjb's Avatar
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    Fantastic !
    1968 911L Coupe - Golden Green
    1971 911S Coupe - Gemini Blue
    1973 911S Targa - Signal Yellow
    1974 914 2.3 - Sunflower Yellow

  2. #122
    Senior Member lopena's Avatar
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    Once again, Ed was right...it’s was something simple.

    Kudos to Ed and Mark for their expertise in resolving this.

    I’m very happy for Arne, but in a way I’m sad to see this entertaining thread come to an end.

    Alan
    N.J.
    Alan
    N.J.


    1964 E-Type roadster
    1969 911S
    1988 328GTB
    2002 Maranello

  3. #123
    Just think, Mark and I and all the other professional mechanics get to do this stuff every day Ya just gotta step back, stop over thinking, and get back to basics. Glad you got it Arne, that's the best part of this job, when it all comes together!
    Early S Registry member #90
    R Gruppe member #138
    Fort Worth Tx.

  4. #124
    Senior Member
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    Great to hear!

    An applause for Ed & Mark

    This thread really showed some of this forums core strengths!
    Porsche 935 DP1 Zirkelbach
    930/10
    Resale red

    Porsche 911, 1971
    2.5L on Webers
    Silvermetallic

  5. #125
    Senior Member tcsracing1's Avatar
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    i will check my car now! Hopefully this is all i need!
    LOOKING FOR 1967S TRANSMISSION #103586
    Looking For 1969T Engine #6195922
    Looking For 1969T Transmission #7194313

    Looking for 1969T Transmission #7195495
    www.tcspeed.com

  6. #126
    Senior Member majordad's Avatar
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    Superb help from the Old Sweats here. Reminds me of the sub heading of Agatha Christie’s book with Hercule Poirot “ The ABC Murders. if after you’ve eliminated everything that’s impossible , then whatever’s left , no matter how impossible must be the possible.”

  7. #127
    Serial old car rescuer Arne's Avatar
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    Quote Originally Posted by tcsracing1 View Post
    i will check my car now! Hopefully this is all i need!
    Hope this is your issue, as it is a really easy fix!

    Just got back from a half-hour drive over the back roads and hills south of here. Car runs great. Will do the final tuning with AFR and call it done.
    - Arne
    Current - 2018 718 Cayman, Rhodium Silver, PDK

    Sold - 1972 911T coupe, Silver Metallic; 1984 911 Carrera coupe, Chiffon white; 1973 914 2.0, Saturn Yellow; 1984 944, Silver Metallic

  8. #128
    Congrats Arne!

  9. #129
    Serial old car rescuer Arne's Avatar
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    A final note. Mark's bench settings for the MFI pump were extremely close. Both part load and idle were borderline lean, so I went 1 click richer on the main rack (part load), and that took care of both. Not planning to mess with this stuff again.

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    - Arne
    Current - 2018 718 Cayman, Rhodium Silver, PDK

    Sold - 1972 911T coupe, Silver Metallic; 1984 911 Carrera coupe, Chiffon white; 1973 914 2.0, Saturn Yellow; 1984 944, Silver Metallic

  10. #130
    Senior Member JT912's Avatar
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    WAIT! Your drove in the rain?
    John Thompson

    1966 912. My first car. Bought it Nov. 25, 1988. Still have it.

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