On a 1997 Mercury Grand Marquis : Check the Vehicle Emission Control Information ( VECI ) decal in the front of the engine compartment , for the type of spark plug used and the spark plug gap
.054 is the gap for the Mercury Grand Marquis.
Remove the spark plug wire from your 2001 Mercury Grand Marquis. Remove the spark plug with a 5/8 deep well socket, white turning it to the left. Reverse the process to put in the new spark plug.
.054
You should have C.O.P. ( coil on plug) there are no wires.
Remove the coil on top of the plug, they are there.
On the 2001 Mercury Grand Marquis , it has the Coil On Plug ( C.O.P. ) ignition system with ( 8 ) individual coils on the 4.6 liter SOHC , V8 engine ( it's not the same , as say , a 1997 Mercury Grand Marquis that had ( 2 ) coil packs with four towers on each coil pack and spark plug wires with the Electronic Distributorless Ignition System ( EDIS )
Each spark plug has a coil on the top. Just remove the coil.
firewall 4 - 8 3 - 7 2 - 6 1 - 5 front of Mercury Grand Marquis
need to know the spark plug gap for a 1979 Mercury Grand Marquis with 351 modified.
by disconnecting the coil or plug wire and the fuel injector connector also for that cylinder.
The 1991 Mercury Marquis spark plug gap is .034. Most spark plugs will be pre-gapped by the spark plug manufacturer.