i have 2 fuel pumps that i am wanting to test...what would be the best way to test them off the car? thanks!

I would say to hook up a 12v source to the pump dry and run it for no more than 2 seconds but I dont know how well that would work out for the pump. I try not to run any of mine dry when I did test them

Hook up some lines on the input and output side of the pump. Place the input in a bowl of gas, remember that pumps are cooled and lubricated by gasoline. Then safely hook up a 12v source and run the pump for a couple of seconds. If it doesn't work try and run the pump in reverse to try and dislodge any debris. Also if that doesn't work a good smack with a piece of wood might help.

These pumps work off of gravity feed so I tested mine using a hose elevated with a funnel. I also secured the pump to the table since it will torque on you when you feed it power. This is how I did mine, not sure if there is a safer way, or if you can even run it dry. I am not responsible for injury, death, or loss of property damage because of my suggestion.

I dont need to tell you to take extreme caution when working with fuel and electricity do I? Try and keep the sparks if any away from the gasoline.

thanks for the reply. how do you run the pump in reverse? i will give it a try...scary.

Switch the + and ground source on the pump terminals and it will spin in reverse.

what about using a less flamable source, like a white gas such as kerosene to test?

I would use jumper cables, as long as you have, and make the connections to the pump first, set it up on the bench and then get the battery/power source as far away as possible. Using some sort of toggle switch would be the safest way.

Be careful & good luck!

What is the purpose of the test? Just function or are you trying to measure pump performance? It is difficult to setup a test or experiment without knowing what the requirements for completion are.