spark plugs replace Mercury Grand Marquis 1998 Owner's Manuals

MOTORCRAFT PART NUMBERS
Component 4.6L SOHC V8 engine
Air filter FA-1032
Fuel filter FG-800A
Battery (standard) BXT-59
Battery (optional) BXT-65-650
Oil filter FL-820-S
PCV valve EV-98
Spark plugs* AWSF-32PP
* Refer to Vehicle Emissions Control Information (VECI) decal for
spark plug gap information. If a spark plug is removed for inspection, it
must be reinstalled in the same cylinder. Cylinders No. 1, 2, 3 and 4
have a9PG9suffix and Cylinders No. 5, 6, 7 and 8 have a9P9suffix. If a
spark plug needs to be replaced, use only spark plugs with the service
number suffix letter as shown on the engine decal.
Capacities and specifications
142