Mike74Bronco
New Member
I have a '74 302 with a mechanical fuel pump and I have a hard time starting it if it has been sitting for more than a couple of days. I can crank the thing until the battery dies and I still won't have any fuel at the carb. It always fires up the first crank if I pour some fuel into the bowl and it runs great after that so I think the pump is mostly working.
I tested the pump today by disconnecting the fuel line from the filter going into the carb and running the line to a jar. I cranked the engine for a good 20 revolutions and no gas made it into the jar. I then "primed" the pump by hooking everything back up and letting the engine run for a few minutes (had to pour some gas in the bowl to get it started). I then repeated the experiment and sure enough I got a nice squirt of gas every revolution.
How many turns should it take to get gas from the tank to the carb assuming that the fuel lines are starting out empty? I suppose this could be normal behavior and my battery is just too weak to crank the engine long enough. Any other ideas?
I tested the pump today by disconnecting the fuel line from the filter going into the carb and running the line to a jar. I cranked the engine for a good 20 revolutions and no gas made it into the jar. I then "primed" the pump by hooking everything back up and letting the engine run for a few minutes (had to pour some gas in the bowl to get it started). I then repeated the experiment and sure enough I got a nice squirt of gas every revolution.
How many turns should it take to get gas from the tank to the carb assuming that the fuel lines are starting out empty? I suppose this could be normal behavior and my battery is just too weak to crank the engine long enough. Any other ideas?