348 spider rev range 5000-7000 not operating | FerrariChat
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348 spider rev range 5000-7000 not operating

Discussion in '348/355' started by ricbowling, Feb 10, 2013.

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  1. ricbowling

    ricbowling Karting

    Jan 21, 2008
    140
    Cascais
    Full Name:
    Ricardo Almeida
    #1 ricbowling, Feb 10, 2013
    My 348 spider works fine until 5000rpm any gear. After that it looks like the engine is making an enormous effort to continue reving. It seems there are no more horse power after the 50000rpm and the rev needle only moves very slowly upward with little if any performance gain. Can anyone advise where i can start looking for the problem? Mafs maybe?
     
  2. Miltonian

    Miltonian F1 Veteran

    Dec 11, 2002
    5,966
    Milton, Wash.
    Full Name:
    Jeff B.
    #2 Miltonian, Feb 10, 2013
    Check for plugged exhaust? Do you still have cats?

    Check for plugged intake? Filthy air filter? Mice nesting in the filter housing?

    Check for low alternator output?

    Check for full travel of throttle linkage when you press the pedal (carpets under the pedal?).

    Check for water in the engine compartment, or in the spark plug holes?

    Bad crankshaft sensors, or the connections to them?
     
  3. ernie

    ernie Two Time F1 World Champ
    Lifetime Rossa Owner

    Nov 19, 2001
    22,614
    The Brickyard
    Full Name:
    The Bad Guy
    #3 ernie, Feb 11, 2013
    Also check your spark plugs and spark plug wires.
     
  4. Dazzling

    Dazzling Formula 3

    Nov 18, 2010
    1,133
    Adelaide
    Full Name:
    Darren
    #4 Dazzling, Feb 11, 2013
    It sounds weird but this one has happened to me...good call!!
     
  5. ricbowling

    ricbowling Karting

    Jan 21, 2008
    140
    Cascais
    Full Name:
    Ricardo Almeida
    #5 ricbowling, Feb 12, 2013
    Check for plugged exhaust? don´t know what you mean...what comes to my mind is the movie with eddy murphy with a banana stuck up his tail pipe :)

    Do you still have cats? No cats

    Check for plugged intake? where is the intake?

    Check for low alternator output? dont know how nor the expected values

    Check for water in the engine compartment, or in the spark plug holes? im going to change all spark plugs to NGK Iridium model DR8EIX since last time i changed them was in 2008

    Bad crankshaft sensors, or the connections to them? what are crankshaft sensors (pic?)

    thanks for the help
     

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