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
.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.
The 1991 Mercury Marquis spark plug gap is .034. Most spark plugs will be pre-gapped by the spark plug manufacturer.
C.O.P. ( coil on plug ) They are under the coil's.
Each spark plug has a coil on the top. Just remove the coil.
firewall 4 - 8 3 - 7 2 - 6 1 - 5 front of 2002 Mercury Grand Marquis
According to one of Fords websites : For a 1993 Mercury Grand Marquis , 4.6 liter V8 engine : ( the spark plugs are gapped at .054 inch )
Remove the spark plug wires from your 2002 Mercury Grand Marquis spark plugs. Remove the spark plugs by turning them to the left with a deep well 5/8 socket. Reverse the process to install the new spark plugs.
need to know the spark plug gap for a 1979 Mercury Grand Marquis with 351 modified.
firewall 4 - 8 3 - 7 2 - 6 1 - 5 front of Mercury Grand Marquis
there is a coil on each one. remove the coil and there is the plug.
pre-heat spark plug, if this works then replace it.