I own a 1938 Dodge D8 Business coupe (six cylinder) and experienced similar problems. In my case it was a combination of issues that finally solved my problem. I pulled the distributor and found the insulation had cracked on the wires going to the points causing intermittent grounding. I replaced that wiring and at the same time I installed new points and condenser. I also purchased a new distributor cap and spark plug wires. Once that was completed, I hooked up my timing light to make sure I had a strong spark. I then installed a 6 volt positive gound inline fuel pump, and wired it to a swi