Hey all! I was driving my 1935 Dodge DU around a few weeks ago with no troubles... It has the original flathead btw. It sat for a week and when I drove it next, I only got about a mile and it stalled. After waiting 5 minutes she would start again and get me maybe 200 feet down the road and stall again. Same deal, wait 5 minutes and she would fire and drive 200 feet and die. Took awhile to get home, ha! So I replaced the original mechnical fuel pump with an electric model and all was well! She drove better than ever... for a few days. Now I am back to the same problem of stalling after driving only a short distance and having to wait. I don't think it is vapor locking as the weather has been in the 70s - 80s when this happened and the new mechnical pump is farther away from heat than the old mechnical one. Help!!!!!
Just a thought. On the old sixes, Chrysler had a heat shield mounted on a stud that screwed into the fuel pump. It kept exhaust manifold heat away from the pump and lines, and forced air from the fan down and over the fuel pump. These are often missing. Your problem sounds more like a stopped up fuel filter - is there one spliced into the fuel lines some place? An air leak in the fuel line will cause these symptoms, too. If the air leak was at the tank, and the electric fuel pump further up front, you may be ****ing air rather than fuel. Are you byp***ing the old mechanical fuel pump? It may have a restriction inside.
How old is the fuel in the tank? A new OE pump would have been fine for another 78 years, if replaced as needed.
You could have some schmutz in the tank that could be getting ****ed against the hose under vacuum and then falls off again after the suction dies down. Or maybe your gas cap is sealing? Have you checked to make sure the fuel tank is venting properly?
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