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Backfiring, misfire, points, and other ramblings

Discussion in 'Early CJ5 and CJ6 Tech' started by jayhawkclint, Jul 11, 2007.

Page 3 of 3
  1. Jul 12, 2007
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
    Joined:
    Sep 20, 2002
    Messages:
    9,221
    Just grabbed my spare out of the barn.

    You're right. I was wrong.
     
    sparky, Jul 12, 2007
    #41
  2. Jul 12, 2007
    jayhawkclint

    jayhawkclint ΜΟΛΩΝ ΛΑΒΕ

    Oklahoma City, USA
    Joined:
    May 18, 2006
    Messages:
    2,622
    Just logged on to say that I fixed it as described above. I was beginning to think that I had a freak distributor or something. Glad to know I actually found the problem, rather than just some random action that resulted in positive gains. Position of the dist/wires definitely matters. Set it to TDC, set the points, dropped the cap, it fired right up. Set the timing and dwell, took it for a drive, no backfire. I still have a little bit of sputtering on decel when in gear, but that might be fuel (still tuning the Holley).
     
    Last edited: Jul 12, 2007
    jayhawkclint, Jul 12, 2007
    #42
  3. Jul 12, 2007
    bkd

    bkd Moderator Supreme Staff Member 2022 Sponsor

    K-Town Tenn.
    Joined:
    Apr 29, 2007
    Messages:
    3,294
    woohoo!!!, good job bro:)
    Jim S.
     
    bkd, Jul 12, 2007
    #43
  4. Jul 12, 2007
    sparky

    sparky Sandgroper Staff Member Founder

    Perth, WA
    Joined:
    Sep 20, 2002
    Messages:
    9,221
    Sweet!

    Now I can take Sunday off or work on my own Jeep. :beer:
     
    sparky, Jul 12, 2007
    #44
  5. Jul 12, 2007
    Hill

    Hill Member

    Colorado
    Joined:
    Mar 7, 2004
    Messages:
    142
    glad that you figured it out. I was all set to give a detailed (complicated) answer. I will save you the pain.

    Now you know why it is a odd fire. 90-150-90-150 etc.
    It is a buick 300 with two cylinders missing.
    You are not tuning two 3 cylinder engines!
    You are tuning three 2 cylinder engines.

    firing order 165432 should tell you something.
    Think about it like this:
    6 - 5 4 - 3 2 - 1

    90 degrees between numbers, and 150 degrees between pairs.

    Peep at your lobes in the distributer.... they are close, then far apart...
    And the rotor HAS to have that tail so that the spark can still reach the terminal!

    -Hill
     
    Hill, Jul 12, 2007
    #45
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