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Thread: Backfire at start up..

  1. Backfire at start up..

    I have a 2015 R20. It just started back firing every time i start it up. It starts fine after the back fire, but an wondering what causes it and what can I do to fix.. Thanks!!

  2. #2
    Join Date
    Aug 2010
    Long Beach, CA
    2015 Z3, 1999 2100i
    What engine in there? Backfires are one of two things: 1) incorrect timing (unlikely), or 2) stuck open intake valve. Stuck intake valves may be a byproduct of water in the cylinder through the exhaust from too much weight or several other factors. A compression test is warranted either way. Keep us posted.
    Fixing everyone elses boat just so I can use mine...

  3. Thanks. Engine is an Indmar 360. I'll get the compression test done and see what happens..


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