According to the 1998 Mercury Grand Marquis Owner Guide it has the
Coil On Plug ( C.O.P. ) ignition system so there are ( 8 ) individual coils
firewall
4 - 8
3 - 7
2 - 6
1 - 5
front of Grand Marquis
On a 1998 Mercury Grand Marquis : firewall 4 - 8 3 - 7 2 - 6 1 - 5 front of vehicle
Each spark plug has a coil on the top. Just remove the coil.
Just remove the coil on top of the plug.
Could be a bad coil, plug, or injector. Start with the coil first.
Could be coil spring or air bag spring system. You have to look.
what is a fire order for 1998 mercury grand marquis
C.O.P. ( coil on plug ). Just remove the small screw, pull the coil up, disconnect the wire, and there you go.
To change the coil packs on a 1998 Grand Marquis, first, ensure the engine is cool and disconnect the negative battery cable. Remove the ignition coil cover by unscrewing it if necessary, then disconnect the electrical connectors from each coil pack. Unbolt the old coil packs from the engine, replace them with new ones, and secure them in place. Finally, reconnect the electrical connectors, reattach any covers, and reconnect the battery.
Maybe the coil is not good ?
According to the 1998 Mercury Grand Marquis Owner Guide : ( 71.9 litres / 19.0 U.S. gallons )
It's a car.
there is a coil on each one. remove the coil and there is the plug.