Re: Re: Re: Possible Coil Problem on Farmall A

Posted by Dave in CT on June 04, 2004 at 21:24:38 from (64.252.222.121):

In Reply to: Re: Re: Possible Coil Problem on Farmall A posted by Christopher S. Dunn on June 04, 2004 at 16:38:50:

Oops, yeah, I was assuming a neg ground in my earlier post about clipping the center coil wire down for a test. Just get it close to a good ground and forget about the distributor bolt and you should be O.K. The spark will be easier to see if it's dusk but, even if sunny, in a good shadow it's pretty easily seen.

If it's a system that's been converted to 12V and you have an external resistor just before the coil, I posted a solution to a similar problem I had a couple of weeks ago. Similarly, after five minutes or so, it'd start running rough, stall out, be unable to start. Let it cool down, it'd restart. I tried leaving the battery connected with the kill switch in the 'run' position without the engine running. I left it that way for about five minutes and, even though the rest of the system was cool, it wouldn't start. The resistor had heated up and was the problem. I replaced both the resistor and the coil with a 12V coil with a built-in resistor (3 ohms resistance) and haven't had a problem since.

Again, I'd be curious to hear what the solution proves to be so let us know.

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