Possible Causes

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2003 Ford RV Cutaway, 2003 Ford Pickup, 2003 Ford F550 Super Duty, 2003 Ford F450 Super Duty, and 2003 Ford Excursion. However, it is still accessible from the selected car via links, so may be relevant.

Loose or leaking fuel supply lines could cause system to lose prime.
Kinked or blocked fuel supply lines.
Massive fuel or oil leaks could contribute to no start conditions.
Loose or damaged Camshaft Position (CMP) sensor and Injection Pressure Regulator (IPR) wiring harness connectors.
Coolant leaks could indicate serious engine problems.
Pinched or open CAC or MAP hoses.