My '62 M38A1 has been having problems with consistency. The jeep has a 225 odd-fire engine, 2G carb. and mechanical fuel pump with a clear fuel filter between the fuel pump and the carb. and another clear filter between the under seat tank and the fuel pump. Some days it runs like a champ - some days it won't even idle. Saturday was a "won't even idle" day. The filter between the carb. and the pump was dry. The jeep would start if I put 2 oz. of gas in the carb. but would stop as soon as the fuel was spent. I left the jeep sit until Monday. This time the jeep started with the 2 oz. of fuel and filled kept running. (The filter between the carb. and the pump was now filling.) Today I disconnected the fuel line below the top filter to see if the pump was working. The pump filled a 32 oz. drink bottle in about 15 seconds. Next I blew out all of the fuel line to check for a blockage and found nothing. The jeep would not start after reconnecting the fuel line and filter (no gas in the filter). Does the pump need to be primed? I am open to suggestions.