Can someone help me diagnose a fuel pump prob. on 93 Grand Cherokee?

93 GC.....Fuel pump will not start and pressureize on its own, if you hit the tank with a rubber hamer it works but will not continue. Is it the fuel pump or something else? I changed the filter but was hopeing it is something besides haveing to change fuel pump
Can someone help me diagnose a fuel pump prob. on 93 Grand Cherokee?
Possibly the ground?
Can someone help me diagnose a fuel pump prob. on 93 Grand Cherokee?
I had the same problem with my Subaru Outback, I let the tank get completely empty, and all the sediment and air at the bottom of the tank was sucked up into the fuel pump, for a couple of weeks I ended up beating on the tank, and adding a product called %26quot;HEET%26quot; to the gas, all is well now...wishing you well
i own a repair shop,a i think you might have a bad connection ,at the point where the wires connect together for the pump,its almost on top of the tank but i think you can still get to them without having to take the tank down on it,and also check the ground wire real good for it this will cause it not to work all the time also,i have done a lot of the jeeps and they always seem to loose ground back there at the tank for some reason,but you might get lucky and not have to pull it out of there good luck i hope this help,s .
The fuel pump might be on it's way out or there is a bad connection in the sending unit. Fuel pumps are at the bottom of the tank so running it low on gas has no effect whatsoever.
Bad electrical connection. Change the pump. Fixing it would be just as much work and you'd still have an old worn out pump.