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Thread: engine popping

  1. 04-11-2011, 11:23 AM #1
    ferry58
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    engine popping

    I just purcased a 73.5 cis that had been sitting for a couple years. Drained gas, changed oil and new plugs. Started right up, has good oil presure and sounds great except for idle. It idles a little fast and pops. Will timing create this? What else could it possibly be? Thanks
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  2. 04-11-2011, 11:30 AM #2
    RSTarga
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    vacum leak or too lean
    David

    '73 S Targa #0830 2.7 MFI rebuilt to RS specs
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  3. 04-11-2011, 03:19 PM #3
    tom1394racing
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    A CIS car that has been sitting for a while will be subject to vacuum leaks due to old, cracked lines and seals. Be careful as this is the # 1 cause of the blown airbox.
    Tom Butler
    1973 RSR Clone
    1970 911E
    914-6 GT Clone in Progress
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  4. 04-12-2011, 07:18 AM #4
    LongRanger
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    Why was it '. . . sitting for a couple years . . .'?

    Rick Kreiskott

    .........

    We Can Be Heroes
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  5. 04-12-2011, 08:49 AM #5
    MountainRoads
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    Quote Originally Posted by tom1394racing View Post
    Be careful as this is the # 1 cause of the blown airbox.
    +1 on this. Install a pop-off valve ASAP, if it doesn't already have one.

    - MR
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