1984 Mondial QV - Misfire below 3000 RPM | FerrariChat
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1984 Mondial QV - Misfire below 3000 RPM

Discussion in 'Technical Q&A' started by Axelsson, May 12, 2006.

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  1. Axelsson

    Axelsson Rookie

    May 9, 2006
    17
    Los Altos, CA
    Full Name:
    Anders Axelsson
    #1 Axelsson, May 12, 2006
    This might have been answered many times before. Have a 1984 Mondial QV that started to misfire below 3000 RPM. When the engine is cold it is ok but as soon as it gets up to normal temp it misfires below 3000 RPM in all gears. Appreciate any suggestions or support. - Anders
     
  2. Iain

    Iain F1 Rookie

    Jan 21, 2005
    3,320
    UK
    #2 Iain, May 13, 2006
    Could be a range of things. First thing to try & determine is whether you are losing the whole engine, one bank or just one or two cylinders. In inductive fed timing light will help you to work this out.

    If you are losing an entire bank then apart from the coil, the coil to cap HT lead, the cap & the rotor you might also like to check the crankshaft sensors..

    For individual cylinders look at the HT leads & also the plug extenders - they commonly burn through.

    I.
     
  3. Axelsson

    Axelsson Rookie

    May 9, 2006
    17
    Los Altos, CA
    Full Name:
    Anders Axelsson
    #3 Axelsson, May 14, 2006
    Thank you - it was a burned through plug extender. Now it runs just fine. Anders
     
  4. Iain

    Iain F1 Rookie

    Jan 21, 2005
    3,320
    UK
    #4 Iain, May 15, 2006
    Excellent, nice cheap fix - those are the ones we like!

    I.
     

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