My f150 battery smells like eggs and will not hold a charge I replaced the battery and the att. Still over charges and battery goes dead over night both are new replaced 3 times now any ideas would be great drawing a blank on this one

I have recently replaced the fuel pump in a 1989 escort. Everything works when it is sitting on the ground. When I put it into place it doesn't work. Any ideas. My nephew bought the car to drive back and forth to school in so he doesn't have a lot of money for a mechanic to fix it.

I have a 1996 F150. When I come to a sto while driving the engine shuts off. It will restart immediately but will shut off again unless I am moving. I've had 3 different mechanics check it out but nobody can figure out the problem. The latest has said that it is most likely an electrical problem....