Diagnostic Aids
WARNING: This page does not describe the selected car, but rather 25 other vehicles, including the 2002 Lincoln Town Car, 2002 Lincoln Navigator, 2002 Lincoln LS, 2002 Lincoln Continental, and 2002 Lincoln Blackwood. However, it is still accessible from the selected car via links, so may be relevant.
Perform this test when directed by QUICK TEST or if directed by other test procedures. This test is used to diagnose:
- Chassis Components
- Engine Vacuum Systems
- Fuel Pressure
- Fuel Filter
- Fuel Return
- Fuel Supply
- Fuel Injector
Fuel System Identification
- Electronic Returnless Fuel System
Electronic Returnless Fuel System (ERFS) does not return fuel to fuel tank by means of a fuel return line. Vehicle does not incorporate a fuel pressure regulator. Fuel pressure is controlled by continuously varying fuel pump speed through Fuel Pump Driver Module (FPDM). - Mechanical Returnless Fuel System
Mechanical Returnless Fuel System (MRFS) does not return fuel to fuel tank by means of a fuel return line. Excess fuel is returned by fuel pressure regulator mounted on fuel pump module located in fuel tank. - Returnable System
Fuel is returned to fuel tank by means of return line from fuel rail.
FUEL SYSTEM IDENTIFICATION
| Application | Fuel System |
|---|---|
| Continental, Cougar, Escape, Escort, Focus, LS, Mustang, Sable, Taurus & Thunderbird | Electronic Returnless |
| Econoline 5.4L (Gasoline), Excursion 5.4L, Expedition 5.4L, Explorer, Explorer Sport, Explorer Sport Trac, Mountaineer, Pickup 5.4L (Gasoline), Ranger | Mechanical Returnless |
| All Others | Returnable |
WARNING:
Always refer to safety procedures to reduce possibilty of injury. See FUEL SYSTEM SAFETY PRECAUTIONS
.