Making any noises? Need more info really. How many miles, is fuel pump, alternator, starter, battery, etc good? Start with battery, then make sure you are getting fuel and fire and have compression.
Verify the fuel pump is working via a gauge. If fuel pressure is adequate, move on to checking the coil, plug wires, etc. An HEI spark detector is only about 15 bucks and easily used. It's a process of elimination.
Search Ford F-150 Questions
Ford F-150 Experts
Related Models For Sale
Used Cars For Sale