328 mid-range sputter | FerrariChat
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328 mid-range sputter

Discussion in 'Technical Q&A' started by Modena michael, Nov 28, 2005.

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  1. Modena michael

    Modena michael Rookie

    Sep 28, 2005
    3
    #1 Modena michael, Nov 28, 2005
    I have a 328 that runs well at idle but between 1500 rpm and 4000 rpm it tends to misfire/bog down yet above 4000 rpm the engine runs strong. I have replaced the plugs, wires, rotor & distributor caps to no avail. Anybody had this problem or have any suggestions.........I think a vacuum leak but what do I know?
     
  2. Mario Gonzalez

    Mario Gonzalez Formula 3

    Apr 13, 2004
    1,333
    Out of my mind
    #2 Mario Gonzalez, Nov 28, 2005
    bad coil?
     
  3. CliffBeer

    CliffBeer Formula 3

    Apr 3, 2005
    2,198
    Seattle, Washington
    Full Name:
    Cliff
    #3 CliffBeer, Nov 29, 2005
    Check the internal fuse to the power supply relay for the Jetronic control unit - this located in the trunk on your 328 I believe, near where the Jetronic unit is located. Had the same symptoms on my 3.2 Mondial and she ran like a dream after replacing the blown fuse.
     
  4. 4redude

    4redude Formula Junior

    Jan 13, 2005
    733
    Fungus Corner
    Full Name:
    Brian Keegan
    #4 4redude, Nov 29, 2005
    I would check coils & power modules. Power modules seem to fail more than the coil itself and are available separately, but not from Ferrari.
    You don't say what year your car is, but there was a Service Bulletin pertaining to a protection diode for the Jetronic box. Some intermittent anamolies were discovered after running the car consistently for long periods (more than two hours?).
    [email protected]
     

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