Re: Possible Coil Problem on Farmall A

Posted by Dave in CT on June 04, 2004 at 09:36:56 from (204.60.45.247):

In Reply to: Possible Coil Problem on Farmall A posted by Christopher S. Dunn on June 04, 2004 at 08:47:57:

I'd check the coil cold and then after it starts to stall out - wait until it is at its worst - like when it won't start again. To check the coil pull the center wire out of the distributor and hold (or clip) the free end of the wire about 1/16" to 1/8" away from a good ground. My H owner's manual shows a method in the timing section of clipping this wire under the distributor cap clip. Clip it so the end of the wire is 1/16" to 1/8" away from the bolt on the side of the distributor where the wire that goes to the positive pole on the coil is attached. If you have help you can hold it in this position with some well-insulated pliers and have the other person turn the engine over. Turn the engine over. When cold you'll probably see a bluish-white spark. When you do the test after it starts to run bad, if the coil is bad, you'll probably see a yellowish spark or, if it's died, no spark at all. Hope this helps. Let us know what happens.

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