Very frustrated with my 308!!!

Discussion in 'Technical Q&A' started by papparazzi, Aug 10, 2017.

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  1. papparazzi

    papparazzi Rookie

    Nov 12, 2004
    35
    Carlisle, MA 01741
    Full Name:
    Christian Delbert
    When I start it up in the morning I'm running on 7 cylinders. 1/2 mile down the road the dead cylinder clears up and she ( it is a she isn't it? )runs well.

    I need a few good ideas here........
    Thanks in advance.

    P.S. I bought it new in 1983 and she's run flawlessly ever since!
     
  2. maurice70

    maurice70 F1 Rookie

    Jan 25, 2004
    3,552
    Sydney
    Full Name:
    maurice T
    I would first check spark plugs and ignition leads..
     
  3. Kevin Rev'n

    Kevin Rev'n F1 Veteran
    Rossa Subscribed Owner

    Nov 29, 2009
    9,544
    Honolulu
    Full Name:
    Kevin
    Spark or Fuel issue?
     
  4. 2NA

    2NA F1 World Champ
    Professional Ferrari Technician Consultant Owner

    Dec 29, 2006
    17,438
    Twin Cities
    Full Name:
    Tim Keseluk
    #4 2NA, Aug 10, 2017
    Last edited by a moderator: Sep 7, 2017
    Check plugs, plug wires and extenders.

    The extenders are known to break down and begin arcing to ground down inside the tube. You can sometimes find a burn mark or even a small hole in the side.
    115647.JPG
     
  5. dakharris

    dakharris Two Time F1 World Champ
    Rossa Subscribed

    Jun 7, 2001
    28,039
    Sleepy Hollow
    Full Name:
    Cavaliere Senzatesta
    Check your vacuum lines for cracks.
     
  6. Big red

    Big red F1 World Champ
    Lifetime Rossa

    Dec 10, 2003
    19,533
    Great White North
    Full Name:
    Clark Kent
    After all fails above If it helps, you may need ingition boxes. That's what I had to change on mine. Your situations sounds similar to what I was experiencing. They don't last long, and if yours are 15 yrs old, they are probably due. If the case, change both. Changing the bad one will only upset you in 90 days going back to change the other one. Good luck
     
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  8. papparazzi

    papparazzi Rookie

    Nov 12, 2004
    35
    Carlisle, MA 01741
    Full Name:
    Christian Delbert
    I have some long and short ones. Only about 1/4 inch difference. Does it matter? Also, what are ignition boxes?
     
  9. Nino1964

    Nino1964 Karting

    Aug 14, 2015
    76
    On my GT4 I was fouling spark plugs with long engine idle warm ups. Now I let warm just enough to circulate oil and then drive gently until engine is warm.
     
  10. moysiuan

    moysiuan Formula Junior
    Silver Subscribed

    Nov 1, 2005
    898
    Toronto, Canada
    Full Name:
    Andy
    Could be a head gasket sealing issue. Small amount of coolant gets into one cylinder combustion chamber, causes poor running in that cylinder, engine heats up and burns off coolant and the thermal expansion reduces the seal leak. See if your coolant level is lowering, even a little, over time.
     

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