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258 rebuild but runs rough

Discussion in 'Intermediate CJ-5/6/7/8' started by mcknight1978cj5, Nov 21, 2009.

  1. mcknight1978cj5

    mcknight1978cj5 mcknight1978cj5

    Please help. Just got my 258 rebuilt and back in. Made sure to get it on TDC and timming mark set to zero. It blows out black smoke and and idles a little rough. Put in new plugs and tried to set the idle / mixture screw in and back out like the manual says. It has a carter one barrel carb on it . If any one has any input Please let me Know. Thanks,
    James
     
    Last edited: Nov 21, 2009
    mcknight1978cj5, Nov 21, 2009
    #1
  2. 73cj5

    73cj5 Member

    Timing should be set to about 8-10 degrees at idle. Set the idle mix screw 1 1/2 turns from the seat. Should run enough to get you close then adjust the idle mixture untill you have maximum rpm then reset the idle speed, shoot for 700rpm.
     
    73cj5, Nov 21, 2009
    #2
  3. mcknight1978cj5

    mcknight1978cj5 mcknight1978cj5

    I'll have to get a timing light. I'll give it a shot a let you know.
    Thanks,
    James
     
    mcknight1978cj5, Nov 21, 2009
    #3
  4. MountainCleric

    MountainCleric Another Member

    Most auto parts stores should have one in their loaner/rental tools.
     
    MountainCleric, Nov 21, 2009
    #4