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backfire but no start.

Discussion in 'Early CJ5 and CJ6 Tech' started by GeoffreyL, Nov 2, 2013.

  1. jeepcj

    jeepcj Member

    I believe you can hook up your timing light and crank the engine over and watch the light, it should flash and let you know what your initial timing is set at, then you will have more of a idea of if it is too retarded or advanced and adjust from there.
     
  2. One thing I haven't seen mentioned is the possible condition of the plug wires to ALL the plugs. You can damage plug wires if you pull on them wrong. Spark at only the #1 plug, won't get your engine running.
     
  3. fhoehle

    fhoehle Sponsor

    Geoffrey, I agree it seems off on timing. Try turning it a bit then attempt start...turn more....attempt start. Usually a few minutes trial n error will get you there. I remember fondly how well that little f head ran on varnish. On real gas it should do great!
     
    Last edited: Jan 29, 2014
  4. flatyfreek

    flatyfreek Member

    Here's how to static time your jeep:

    Find your timing mark.
    Remove the distributor cap.
    Turn your engine by hand to the timing mark on the #1 compression stroke.
    Verify your rotor is pointing to where the #1 plug wire is on your cap.
    Your points should just be starting to open at this point
    If not, loosen the distributor, turn key on, but do not crank the engine
    Slowly turn the distributor until you hear the points spark.
    Lock down the distributor, it's now timed.
    Crank the engine with the cap off to verify rotation.
    Verify wire positions and try to start the engine.
     
  5. tarry99

    tarry99 Member

    You can also take the coil wire off of the distributor side and the other end off the coil will spark when near ground.
     
  6. GeoffreyL

    GeoffreyL Well-Known Member

    Where do i find the timing marks? i dont see any or know where to look. Thanks. i tried loosening it today and turning it and still nothing...i'm so frustrated i'm ready to take it somewhere.
     
  7. jasonjp62

    jasonjp62 Member

    [​IMG]QUOTE=GeoffreyL;1142010]Where do i find the timing marks? i dont see any or know where to look. Thanks. i tried loosening it today and turning it and still nothing...i'm so frustrated i'm ready to take it somewhere.[/QUOTE]

    Look on your crank pulley on the passenger side you should see the indicator, there will be a notch on the pulley itself.
     
    Last edited: Feb 19, 2014
  8. GeoffreyL

    GeoffreyL Well-Known Member

    Look on your crank pulley on the passenger side you should see the indicator, there will be a notch on the pulley itself.[/QUOTE]

    Thanks!! i found both! its dark out now, i'll try it tomorrow!! hopefully it will run and i can move on to the fun stuff like brake, lift,tires, fluid changing etc.
     
  9. PeteL

    PeteL If it wasn't for physics, and law enforcement... 2024 Sponsor 2023 Sponsor 2022 Sponsor

    A dab of white paint, or some chalk, will help the notch show up for the timing light.
     
  10. 1960willyscj5

    1960willyscj5 Well-Known Member

    I use white nail polish to mark my indicators. Really shows up when the timing light fires on them.
     
  11. GeoffreyL

    GeoffreyL Well-Known Member

    I want to give a big thank-you to everyone who helped out and point me in the right direction, i finally got it running today! it drove 10 feet today under its own power for the first time in over 20 years... Now powered by a new to me f-head (thanks Frank!), looking forward to moving on to the fun stuff and putting it on the road eventually!
     
  12. tcfeet

    tcfeet Member

    Ok, now what did you do to get it started?????
     
  13. GeoffreyL

    GeoffreyL Well-Known Member

    The plug wires were off by one and the distributor came loose between when I bought and and put it in so it needed adjusted as well. It started right up! I had a mini celebration, put the rad/grille on and put antifreeze in but its leaking around the waterpump so time to get a new on and put it on there, but I did drive it 10 feet!
     
  14. tcfeet

    tcfeet Member

    Good deal, now your ready to roll!!!!