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Motor Miss

Discussion in 'The Hokey Ass Message Board' started by hollywood 423, May 21, 2009.

  1. hollywood 423
    Joined: Aug 25, 2005
    Posts: 226

    hollywood 423
    Member
    from west ohio

    My banger has a miss at a constent speed. Not just on 1 cyc. but on all of them. When accelerating or pulling a hill,it smooths out and runs real good. Have a centrifugal advance Mallory on it and one 97 with a 45 jet. At crusing speed it burbles and pops,but mash the footfeed and it runs to beat hell. I've tryed all I can think of so
    I thought i'd see what you guys think..
     
  2. jetmek
    Joined: Jan 12, 2006
    Posts: 1,847

    jetmek
    Member

    sounds too rich...ck the float level, fuel press etc. also those downdraft manifolds dont have a hot spot from ex manifold so they run crappy till they heat up
     
  3. onlychevrolets
    Joined: Jan 23, 2006
    Posts: 2,307

    onlychevrolets
    Member

    my nailhead ran like that , it was to lean.... what do the plugs look like?
     
  4. madmax
    Joined: May 2, 2006
    Posts: 42

    madmax
    Member
    from Calif.

    Check your total advance at rpm.

    The Mallory units out of the box will have about 50' toatl and a 4 banger will only accept about 26 to 28.

    Even the Bonneville engines with a mag we set at about 28 total.

    This will require resetting the total advance stop under the point plate. Take a look and it will be self expalnitory.

    The 45 jets should be fine.

    When overadvanced you will have a constant miss at cruise but under load it will be ok but in fact it is detonating.

    Any questions, give me a call at the shop in the AM 1-818-248-2347

    Max Sr. @ handhantique.com
     
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