1995 456GT issues w right engine bank | FerrariChat

1995 456GT issues w right engine bank

Discussion in '456/550/575' started by AKINSB, Jul 5, 2015.

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  1. AKINSB

    AKINSB Formula Junior

    Feb 15, 2013
    502
    Santa Barbara
    Full Name:
    Alex K
    #1 AKINSB, Jul 5, 2015
    Last edited: Jul 5, 2015
    Car has been problem free for 2 years after I replaced both catalytic ECU modules and ran flawlessly 2 weeks ago. Wanted to go out for a quick drive today and after start up the right engine bank seems to be having issues. Started easily. Idled smoothly. The check engine light comes on for less than a second and then the slow down light comes on for less than a second and then both go off for 30-120 seconds. Does this repetitively. Engine idles smooth but feels underpowered when driven. Drove it around until all warmed up but the issue continues. Tried cleaning the contacts at the modules in front of the doors but the issue continues.

    Any suggestions for a guy with limited mechanical skills. Mechanic is 100 miles away from home in LA.

    Best

    AK
     
  2. bay

    bay Formula 3

    Mar 13, 2011
    1,224
    Belgium
    Full Name:
    Bernard
    #2 bay, Jul 5, 2015
    possible Part No. 153111 THERMOCOUPLE ?
     
  3. AKINSB

    AKINSB Formula Junior

    Feb 15, 2013
    502
    Santa Barbara
    Full Name:
    Alex K
    #3 AKINSB, Jul 5, 2015
    Second follow up question: Do you think I can drive the car for 100 miles?
     
  4. bay

    bay Formula 3

    Mar 13, 2011
    1,224
    Belgium
    Full Name:
    Bernard
    #4 bay, Jul 5, 2015
    For me , no !
     
  5. 166&456

    166&456 Formula 3

    Jul 13, 2010
    1,723
    Amsterdam
    #5 166&456, Jul 6, 2015
    A few questions for you:
    Do the exhaust and the manifolds on the right become warm?
    Does it smell of fuel out of the exhaust?
    If it smells of fuel, it could be failure of the ignition amplifier. If there is no fuel smell and no/little heat, it is most likely that there is no fuel making it to the right engine bank. The cause of that is likely the fuel pump or its power supply (relay or fuse).
    Have the fuel pump rubbers been replaced yet on your car?
     
  6. 360modena2003

    360modena2003 Formula 3

    Jul 11, 2009
    2,399
    #6 360modena2003, Jul 6, 2015
    As 166 said, first determine if it a fuel or ignition related issue -

    Remove spark plug and look at the condition of the plugs - take pictures and post them here.

    If the spark plugs are "dry", then you have a fuel delivery issue -

    Also, touch the manifold and exhaust to make sure which bank is having issues.

    Good luck
     
  7. PSk

    PSk F1 World Champ

    Nov 20, 2002
    17,673
    Tauranga, NZ
    Full Name:
    Pete
    #7 PSk, Jul 6, 2015
  8. au-yt

    au-yt F1 Veteran
    Silver Subscribed

    Aug 13, 2006
    5,834
    Burradoo... Actually
    Full Name:
    Graeme
    #8 au-yt, Jul 6, 2015
    And re check all the electrical connections ..again
     

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