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Timing for Buick 3.8

Discussion in 'Early CJ5 and CJ6 Tech' started by Dondo, Oct 14, 2005.

  1. Dondo

    Dondo These are my good pants..

    In my "winterizing" of my Jeep, I decided that it's time to do something about the backfiring on the starboard side of my 80's Buick 3.8 liter. Been looking around the web for some timing numbers, but have not had much luck. Anyone know what it should be set at?

    Just to cover my bases, I've replaced plugs, cleaned cap/rotor, and checked that the plug wires were in correct order. I really only notice the backfire when ideling at a stop lights/whatever. While under power, I can't hear any backfiring, or at least can't tell if it;s popping or not. I also think the carb is loading up a little while idleing, but I don't know how to lean a carb either...

    Dondo
     
    Dondo, Oct 14, 2005
    #1
  2. 61CJ5

    61CJ5 Member

    From what I've read, specs for a 231 buick is 12 degrees. I'm not positive on that, but my '76 buick 231 runs good at 12.
     
    61CJ5, Oct 15, 2005
    #2
  3. DanStew

    DanStew Preowned Merkin salesman Staff Member

    my jeep backfired only on one side. make sure there is not an exhaust leak on that side. also maybe check your ignition coil. Do you have HEI? I had a coil go bad on mine and only ran on one side and te other backfired with 2 foot flames out the side pipe.
     
    DanStew, Oct 15, 2005
    #3
  4. fatty

    fatty New Member

    My 84 buick w/ stock hei calls for 15*. I just installed the D.U.I. distributor and it call for around 20* because of the hotter coil.
     
    fatty, Oct 15, 2005
    #4