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  1. #1

    R12x not running right

    Howdy,
    I have an r-12x with an aftermarket impeller that recently started acting up. It takes a while to get it fired up when its cold. Itll turn over and run for a couple of seconds but it has a bad knock and then shuts off. Once it does finally get running, it runs rough and will top out around 45mph. Every now and then itll clear up and go 60ish like normal. (these are the speeds indicated on the dash, not gps). I have always run this thing on premium gas. Any ideas of what it could be? I have a feeling its a fuel problem but im not sure.


  2. #2
    jlfx car audio's Avatar
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    Try new plugs

  3. #3
    Quote Originally Posted by jlfx car audio View Post
    Try new plugs

    Yep, that fixed it. Also changed the oil. Got out almost 6 quarts and it had a slight fuel smell. Are these engines known for GIO? In any case, it runs great now.

  4. #4
    jlfx car audio's Avatar
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    Yea I usually pump out 5qts with 50hrs use .

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