Vehicle will start but not stay running
I have a 2001 ford expedition with the 5.4
liter motor. It will crank and start but within a
few seconds it dies. When I bought this
vehicle it needed a new ignition and key. I
had a locksmith install the ignition and
program the key. What could be the
problem. The fuel inertia switch seems to be
functioning properly. I dropped the tank &
pulled the fuel pump out and supplied
power to it and it worked fine.