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dcvengros

I've got a 1966 Chrysler 300 with a 383 four barrel carburetor. Runs beautifully, once you get it started. I have to crank the heck out of it to get the fuel from the gas tank to the carburetor. My "old car" mechanic says that because there is no gas on the driveway that what is happening is that the gas in the carburetor evaporates after a day or two and that cranking is the only solution. He swears that this happens with all old cars and that I better get used to it.

That does not make any sense to me. First, I've driven a ton of old cars and never had this issue. Second, no way can the gas evaporate that fast. There must be a hole in somewhere from the gas tank to the carburetor where the fuel pressure drops to where the gas flows back into the tank. My mechanic says this is a problem with all old cars.

How do I fix it?

TAPOUT

Get an electric fuel pump.

Oldcar_Mechanic

Remove the air cleaner before you attempt to start the car after a few days and open the choke plate (that is, if it's closed) and watch for a fuel spray as you work the accelerator.

Make sure that the choke is working properly.

Install a see through filter in the fuel line before the card to see if it holds fuel after a few days.

Ron

Steve E.

It's possible the valves in your fuel pump are sticking/leaking and letting the fuel in the lines and or carb leak back to the tank & whats left in the carb evaporate. Other possibility is a pinhole in the lines from the tank more or less causing the same thing to happen. disconnectline at fuel pump and plug, use a rag or something and apply air pressure to the tank thru filler neck while having someone else watch under car for leaks. Good luck.

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