Possible Causes
WARNING: This page is about a different car, the 2003 Ford Pickup, 2003 Ford F550 Super Duty, 2003 Ford F450 Super Duty, 2003 Ford Excursion, and 2003 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
- A stuck-open regulator valve will cause low fuel pressure.
- A stuck-closed regulator valve (possibly caused by debris) will cause high fuel pressure for a short time until the pump fails.
- A loose fuel line on the suction side of the fuel system can cause air to be ingested into the system and cause low fuel pressure.
- Electric fuel pump.
- Fuel pump fuse.
- Fuel pump relay.
- Inertia switch.
- Fuel pump circuit faults.