I have a 1980 CJ5 that I've been trying to get running. I put a new fuel pump on it and cleaned the carb. Drove it around the yard several times, sat and idled revved everything seemed great. Drove it next door to show my Uncle and it died. No fuel to the carb! Is there anything I could have done wrong while installing it(seemed simple enough) or did I just buy a BAD pump. Is there anything that could happen with the eccentric that operates the pump? Now I'm considering an electric pump. Yay or nay. If so what should I look for. I am not a troubleshooter but I can take stuff apart and put it back together, most of the time
It's possible that the eccentric is worn out, but not likely (you can inspect it through the hole when you remove the pump.. look for deep grooves). It could also be that you purchased a bad pump (again, unlikely, but possible). I would be looking for an obstruction in the fuel system somewhere. Could be a clogged filter, kinked line, plugged vent, or blockage at the pickup in the tank. An electronic pump is not a bad thing to have, but I would resolve the current problem before making modifications. Good luck
A 1980 Jeep now has a fuel system that is 33 years old if it is all original. Start from scratch and drop the tank and look for rust and other debris inside of tank. Check all the fuel lines for rust and corrosion and replace as necessary.
Your fuel system may need a complete overhaul. I know mine did!
FYI, new (reman'd) mechanical fuel pumps can be bad right out of the box. I had to return 2 NAPA pumps before I got one that worked.
It's an easy test. Just disconnect the fuel line from the carb and stick it in a separate container. Then crank the engine and see if you get a steady stream of fuel from the line. If it comes out bubbly, then you have a leak somewhere upstream. If it doesn't flow at all, then the pump is probably bad, or you have a major obstruction. If it's the latter, you can further isolate the problem using Bagus' suggestion.
So I run a hose into a gas can, turn the engine over, nothing. Take the pump back off try it manually by pushing the lever by hand, gas to the sky! I can't see how I could be installing it wrong since it did work one time. I've reinstalled it like 20 times Made a block off plate so tomorrow the pump goes back and I'm buying a universal electric.