ENGINE DATA
Engine
4.6L 2V V8
engine
4.6L 3V V8
engine
5.4L V8 engine
Cubic inches 281 281 330
Required fuel
87 octane 87 octane 87 octane or
Ethanol (E85)*
Firing order 1-3-7-2-6-5-4-8 1-3-7-2-6-5-4-8 1-3-7-2-6-5-4-8
Ignition system Coil on plug Coil on plug Coil on plug
Spark plug gap
0.052–0.056 inch
(1.32–1.42mm)
0.039–0.043 inch
(1.0–1.1mm)
0.039–0.043 inch
(1.0–1.1mm)
Compression
ratio
9.4:1 9.8:1 9.85:1
*5.4L 3V FFV engines only.
2009 F-150 (f12)
Owners Guide (own2002), 3rd Printing
USA (fus)
Maintenance and Specifications
397
