1994 Ford F-150 5.0 V8 Help Gets Fuel No Fire Help Please

1994 Ford F-150 5.0 V8 Help Gets Fuel No Fire Help Please 1994 Ford F-150 5.0 V8 Help Gets Fuel No Fire Help Please. The truck will start n run when it wants too. I already cleaned all the connections, put a new coil on, cleaned the lock cylinder and the switch. Sometimes I can go out and it will start up n then other times no fire. No matter what I do it will not fire then other times it will. I'm lost on it and just can't seem to find the problem. Any help would be greatly appreciated.