new lifters in, not running right

Discussion in 'FXR Models' started by 84FXRS, Apr 3, 2011.

  1. 84FXRS

    84FXRS Member

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    Just finished installing new lifters, but when I started her up, shes not running right, sounds like an air leak, but I've checked that,
    an she spits from the carb, enoungh for gas to come out through the
    air filter.. and suggestions?
     
  2. Breeze3at

    Breeze3at Well-Known Member

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    Adjustable or stock pushrods? If they are stock, are they in the correct position? Longest (green stripe) front exhaust, 2nd longest (purple) rear exhaust, shortest (blue) rear intake, next to shortest, front intake. Did you tighten the rocker arms down s-l-o-w-l-y to let the lifters bleed off?
    If they are adjustable pushrods, look in the self help section (tab at top left of page) for several good articles on adjusting.
     
  3. ckphir0

    ckphir0 Member

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    I agree with BREEZE, check the lifters again, sounds like the intake valve is not closing (not that I am a pro at this)
     
  4. 84FXRS

    84FXRS Member

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    stock pushrods, all same length in mine. marked them to put them back in order.
    took my time , think everything is right, but I guess not.
    Did note that front exhaust pr was tight, rear intake pr was tight (didn't spin but hand)
     
  5. Jack Klarich

    Jack Klarich Expert Member

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    Do you have a compression gauge? I would do a test and see if the cylinders leak down or the gauge bounces I bet you have a hanging valve. I hope I am wrong Good Luck
     
  6. 84FXRS

    84FXRS Member

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    didnt change the cam lifters only,
     
  7. 84FXRS

    84FXRS Member

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    Tbones used Sifton lifters an no I didnt know to set them in oil

    for those not looking to learn the hard way;
    long pushrods are exhaust (outside)
    short pushrods are intake (inside)
    fronts and rears are different lengths
    ( dont mix 'em up)
    looks like the valves are ok-whew
     
    Last edited by a moderator: Apr 6, 2011
  8. TQuentin1

    TQuentin1 Well-Known Member Staff Member Moderator

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    Glad you got that figured without any major catastrophe!!

    TQ
     
  9. Jack Klarich

    Jack Klarich Expert Member

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    Good for you I was nervous for a minute:s
     
  10. 84FXRS

    84FXRS Member

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    did I forget to mention, rear exhaust rod ( in wrong position )
    did suffer beyond use, but we are thru the worst part,
    now we know whats happening and moving foward.