Technical Flathead won’t always fire!

My 41 sedan usually fires right up. Last Saturday I went to crank it, and it wouldn’t fire. I had run it only a week before with no issues. Looking under the hood, there was a lot of moisture. I sprayed WD-40 under the cap and wiped it down. Still nothing. I checked the coil spark and it was good. I swapped out the distributor(pancake) and it fired right up. I drove it around for awhile, and it sat at Mom’s house for about an hour while I visited with her. I went to leave and it wouldn’t fire! I finally got it to fire up, and drove it home. After I pulled it in the garage, I shut it off, then turned the switch back on and tried to crank it. No fire!!! Today, I tried to crank it. Nothing. I adjusted the vacuum screw out a good bit, and it fired up. I let it run for about 10 minutes, then shut it off. I turned the switch back on and it fired off and started easily! Problem solved - right? Nope. I turned it off again, turned the switch back on, and it refused to fire! Please help!!!


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Check voltage when it won't fire.
I had a column switch that sometimes did not make a good connection.
I bought a new contact for the switch and it works perfectly.
Start with the basics. You might even have a loose wire somewhere.