Fuel issues
Hi all, I have a 1955 F-350, I use it a lot to get work done around the neighborhood. Unfortunately whenever I drive it for more than 30 minutes or so it begins to sputter and chug like it's running out of fuel, it's strange because I made sure all the lines are clean and the gas tank is brand new. Replaced my fuel filter twice just to be sure, I've also pretty much rebuilt my ignition system though the plug wires are still very old and need to be replaced. It's got a 6v positive ground system, mechanical fuel pump, 239CI Y block V8. The pump isn't the issue as I've watched it fill an empty filter in less than 3 seconds. I suspect maybe the float is the issue because it didn't do this when I first bought the truck. Another modification I made was adding a 190 degree thermostat, after this change is when I noticed this issue, vapor lock possibly? Once the engine cools down it will run good again for awhile. Thanks for your time and knowledge, hope someone knows what it could be.
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