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Turns Over, But Won't Fire........,

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  • Turns Over, But Won't Fire........,

    My '73 TR6 project has hit a snag. I have it at a shop that has done the wiring for me and everything in that area is fine. The shop owner said he would be glad to fire her up for the first time for me (it's been a four-year process). Of course I was glad to allow him to do this. However, he has tried everything and it will turn over, he has spark, he has even tried to bottle feed it at the carbs, but it simply won't fire up........he says it cranks fine. He has also checked the distributor, points, and the only thing he can think of is that the timing is way off. Before we/he goes any further, do you guys have any ideas?

  • #2
    Was the engine rebuilt? If someone has been in there, it is not uncommon to see the drive gear for the distributor installed 180 degrees out. Check top dead center with cylinder 1 firing and see which way the rotor button

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    • #3
      Is pointing

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      • #4
        You could try changing the condenser in the dizzy. They've been know to fail right out of the box.
        CF1634U+O Pimento/Chestnut
        2nd owner, since 1975
        Now in Fair Oaks, CA

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        • #5
          Todd,
          I think you told me that after Sam rebuilt your engine he ran it on a dyno....so that would eliminate timing issues.

          I don't remember if you're using the AAW harness...if so, there is a ground wire designed to be a type of theft protection. It can run through a switch to ground or just tied directly to ground. If that's not getting ground the engine will crank but not start.

          Finally, last year, I switched back to points from Pertronics and had the low tension wire from the dizzy going to the positive post on the coil instead of the negative post. That cooked my condenser and I had the cranks but won't start fun.

          Doesn't sound like your Six will make it to this years "British Return to Fort Meigs" (6/2/19) car show but hopefully you can slip over and spend some time with us.

          Best,
          Jim
          Last edited by Tripp74; 05-28-2019, 05:31 PM.
          Jim / NW Ohio
          "Tillie"... a '74 dressed like a '69 / CF14608U
          Blog: www.trippstr6.blogspot.com

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          • #6
            pull the number 1 spark plug (front of engine) and pull the distributor cap (undo coil wire too just to avoid unplanned shocks). Plug the spark plug hole with your finger and turn the car over (very short burst works best) until you feel your finger get a strong puff from the compression stroke - the one it should fire on. Look at the rotor and it should be pointed to where the #1 cylinder wire on the distributor cap should be. My guess is that it will be pointing to where #6 is located on the distro cap.

            If you've tried starting fluid and got nothing then its a spark issue. SInce you can see spark (assuming) then its a distributor out of phase issue. The easiest way to check is the procedure described above. I can attest because I had this issue last week after assembling my sons 74 ( it was 180 out). Once you determine the compression stroke for #1 cylinder, you can map the spark plug wires on the rotor cap to match what they need to be (so, moving the #1 wire to where the rotor is pointing with the #1 cylinder on compression stroke).

            If the rotor is pointing to #1 on #1 cylinder compression stroke and starting fluid isn't working.....you've got an issue!

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            Turns Over, But Won't Fire........,

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