MY car was not being started regularly as I was in the middle of restoring it. I had heard that there were issues with new fuel pumps. I bought 2 before I finally took a friend's advice.
Background:
Fuel tank restored
Hard and soft fuel lines replaced
Carbs restored
I filled the fuel bowls, and it would run for a bit
I filled the fuel filter and bowls, and it would run
A few days after shutdown I noticed that the fuel filter bowl was not full, a few days later it was empty. Would not start, would not fill fuel filter bowl. I was convinced that the pump was not strong enough to pull fuel from the tank to fill all the lines and the fuel filter. As part of troubleshooting, I used a jerry can and short hose to simulate the tank and hard line. Could not pull fuel to fill the filter. There was some information regarding the amount of vacuum created by the pump, so I measured the pumps. Sorry but I forget the results and have lost my notes. An old school method to test a mechanical fuel pump is to put it in a vise and work the arm. If it wheezes it supposedly is more likely that it is ok, if not it is supposedly bad.
Solution to my issue:
A friend told me to recheck all of the hoses from the fuel filter to the carbs. I did that everything seemed tight. I replaced all of the hoses and this time I used the correct diameter. It was more difficult to connect the right diameter, they seemed overly tight. When this was done, I once again filled the fuel filter and the float bowls. It started and I have not seen the fuel filter bowl empty since, that was 7 or 8 months ago. The car has not been restarted due to other work on it that I am doing. My story is not complete β I never did put the original pump on to prove that it still had life.
Bottom line:
I am sure there are some bad fuel pumps out there, and I am not saying that you donβt have a bad fuel pump. This is what seemed to solve my problem. It was difficult for to believe it at the time, but as the months went by and the fuel filter remained full other issues became more pressing. The car starts now even after long periods of storage.
Hope this helps.