My 93 F150 will not start after running for a short time. It cranks as if I have a dead battery, jumped off of car no help. I have checked the cranking amps on my battery and they are ok, new starter, new solenoid, new plugs, new wires, new distributor cap. The truck does run warm and I was told it may be related to O2 sensor. Any ideas? Thank you for any considerations. Have a great day..