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Point Gap 225 V6

Discussion in 'Early CJ5 and CJ6 Tech' started by juffer, Nov 26, 2016.

  1. Nov 26, 2016
    juffer

    juffer Juffer 2020 Sponsor 2019 Sponsor

    Netherlands
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    Jun 16, 2007
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    210
    hello

    Does anyone know the specs of a coil of a 225 v6?
    And when I change ignition points does the timing changes also?

    Have suddenly problems with starting;

    battery is OK
    there is a spark on all cilinders
    fuel is pumping ( acceleration is squirting fuel)

    It wont start, and smells fuel after a while

    THe specs I read are 1,4 and 7,94 on the coil. (primary and secundairy)
     
  2. Nov 26, 2016
    1960willyscj5

    1960willyscj5 Well-Known Member

    Mesa, Arizona
    Joined:
    Nov 27, 2006
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    Point Gap. Isn't that a town in New Mexico?

    Check your timing statically (with out the engine running)
    Set the point gap to whatever you get using a matchbook cover as a gapping tool. should start at this point.
    Then reset the point dwell using a correct size allen wrench and a dwell meter. I don't remember what the dwell is supposed to be, but someone here can tell you.
     
  3. Nov 26, 2016
    timgr

    timgr Jeepin' Nerd 2020 Sponsor 2019 Sponsor

    Medford Mass USA
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    If you smell gas, it's probably flooded.

    Yes, you can set the point gap roughly and the car will still start and run. It does change the timing when you change the points.

    Are you trying to measure resistances of the coil primary and secondary? It is hard to get an accurate measurement of low resistances with a multimeter. I'd suggest you try another coil and see if it makes any difference (I think it will not if you have spark already). If you can't take one from another car or pick one up at the junkyard, a spare coil is a good thing to keep in the Jeep. They can and do fail suddenly - BTDT.
     
  4. Nov 27, 2016
    jeepcj

    jeepcj Member

    cincy, Ohio
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    Aug 23, 2009
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    601
    im pretty sure the point gap is .16, and the dwell is 30. timing should be set to 5* I believe.
     
  5. Nov 27, 2016
    1960willyscj5

    1960willyscj5 Well-Known Member

    Mesa, Arizona
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    Just remember to reset the timing after getting the dwell right. Changing dwell will change the timing. Timing will not change the dwell. Once that is all done, then you get to reset the carburetor.
     
  6. Nov 27, 2016
    Focker

    Focker That's what I do, I know things and I fix stuff. Staff Member 2019 Sponsor

    Tri-Cities WA
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    From the sticker under the hood on my '71.

    Engine at normal operating temp
    Idle mixture - Lean best idle
    Ignition timing - 0° TDC
    Plug gap - .035
    Dwell - 30° (.016 Point gap)
    Idle speed - 650-700 RPM
     
  7. Nov 27, 2016
    juffer

    juffer Juffer 2020 Sponsor 2019 Sponsor

    Netherlands
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    Thanks for this information. It helped.
    Running again with new cap, points, rotor
     
  8. Nov 27, 2016
    1960willyscj5

    1960willyscj5 Well-Known Member

    Mesa, Arizona
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    Don't know why, but 0 degrees bdc does not sound right. Thought it should be either 5 or 10 degrees bdc.
     
  9. Nov 27, 2016
    Focker

    Focker That's what I do, I know things and I fix stuff. Staff Member 2019 Sponsor

    Tri-Cities WA
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    BTC not BDC

    0° TDC
    5° BTC
     
  10. Nov 28, 2016
    1960willyscj5

    1960willyscj5 Well-Known Member

    Mesa, Arizona
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    Senior Moment. AKA: Brain Fart!
     
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  11. Nov 28, 2016
    timgr

    timgr Jeepin' Nerd 2020 Sponsor 2019 Sponsor

    Medford Mass USA
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    I've always heard "before top dead center" so BTDC ...
     
    eti engineer and cookieman like this.
  12. Nov 28, 2016
    CJ568

    CJ568 New Member

    Kilgore, TX
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    I believe it's 0 deg with a Prestolite distributor, and 5 deg with a Delco. Don't know why it would be different?
     
  13. Nov 28, 2016
    Focker

    Focker That's what I do, I know things and I fix stuff. Staff Member 2019 Sponsor

    Tri-Cities WA
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    Let's resort to this (I didn't circle anything, it was in there when I got the manual).
    [​IMG]
     
  14. Nov 29, 2016
    1960willyscj5

    1960willyscj5 Well-Known Member

    Mesa, Arizona
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    Because I have no visible timing marks on my block or timing cover, I started at 0º TDC as my starting point just to get it started, and then used my vacuum gauge to set the idle speed timing once it was running. Observing your gauge, you then advance the timing until you get to peak vacuum. (about 22º or 24º, but could be lower, depending on your altitude.) Once you reach the peak, stop, then back it off until the needle just starts to drop, then snug the hold down bolt to keep it from moving. Reset your idle and mixture. Let the engine get good and warm (your normal operating temperature that was observed while your were running around in the JEEP before.) Now shut the engine down, and try to start it up again. If it starts right up and the starter motor spins like it should, then tighten the hold down bolt to what it should be. If it acts like you need a new battery, then ease the distributor a tad bit, then try to start it again. Keep backing it off until your starter motor spins like it should and lock everything down. You are now timed. My distributor doesn't have vacuum advance on it so I don't have to worry about that. Those of you that have vacuum advance need to disconnect and plug the line for the vacuum advance to do this procedure, and then hook the vacuum advance back up when you are done.

    bet your gas mileage goes up,, too.
     
  15. Nov 30, 2016
    chief1983

    chief1983 Member

    Saint Charles, MO
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    BTC is Behind Top-dead Center, meaning -5*. TDC is Top Dead Center and would only be seen written such at 0* probably. Probably left the D out of BTC because everyone likes TLAs.
     
  16. Nov 30, 2016
    Mcruff

    Mcruff Earlycj5 Machinist

    Albertville, AL
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    BTDC means "Before top dead center"
     

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