Ford F150 Pickup. Instruction - part 1715

FUEL SYSTEM 

FUEL PRESSURE 

Specifications 

FUEL PRESSURE SPECIFICATIONS 

IGNITION SYSTEM 

FIRING ORDER 

Illustrations 

4.2L

17.3 (16.4)

4.6L & 5.4L

19.4 (18.4)

Pressure Cap

16 psi (110 kPa)

Thermostat Opens

Starts To Open

188-195°F (86.7-90.6°C)

Fully Open

208-215°F (97.8-101.7°C)

NOTE:

Fuel pump performance is a measurement of fuel pressure and volume 
availability, not regulated fuel pressure.

Application

(1)

 psi (kPa)

CNG Engines

80-120 (276-827)

Gasoline Engines

4.2L & 4.6L

30-45 (207-310)

5.4L

30-55 (207-379)

(1)

With key on and engine off and fuel pump running.

 

2003 Ford Pickup F150 

2003 SPECIFICATIONS F150 Pickup

  

Fig. 7: Identifying Firing Order & Timing Marks (4.2L) 
Courtesy of FORD MOTOR CO. 

 

2003 Ford Pickup F150 

2003 SPECIFICATIONS F150 Pickup

  

Fig. 8: Identifying Firing Order & Timing Marks (4.6L & 5.4L - Coil On Plug) 
Courtesy of FORD MOTOR CO. 

HIGH TENSION WIRES 

Resistance Specifications 

On all models, high tension wire resistance should be no more than 7000 ohms per foot. 

Wire Routing 

 

2003 Ford Pickup F150 

2003 SPECIFICATIONS F150 Pickup

  

Fig. 9: Identifying Spark Plug Wire Routing (4.2L) 
Courtesy of FORD MOTOR CO. 

IGNITION TIMING 

BASE IGNITION TIMING 

NOTE:

On all models with distributorless electronic ignition, manufacturer does not 
recommend checking ignition timing, as faulty readings are common and timing 
is not adjustable.

Application

Degrees BTDC

 

2003 Ford Pickup F150 

2003 SPECIFICATIONS F150 Pickup