Check the Vehicle Emissions Control Information ( VECI ) decal
located in the front of your engine compartment ( it will show the
type of spark plugs used and the spark plug gap )
You do not need to remove the fuel rail to remove the spark plugs.
Each spark plug has a coil on the top. Just remove the coil.
If you want the best plug that will last around 150,000 kms , or 100,000 miles, cost is around 15.00$ each.
Dirty spark plugs can occur on any make, model, or year. Changing the spark plugs should be done for maintenance, such as when you do a tune up.
On a 1998 Mercury Grand Marquis , 4.6 liter V8 engine : firewall 4 - 8 3 - 7 2 - 6 1 - 5 front of vehicle
what is a fire order for 1998 mercury grand marquis
on top of the engine there is a cover sheild. remove the cover by the four bolt. the plug boots will come with it, the spark plugs are down in the holes.
It has spark plugs. They are just hidden from view.
Under the aluminum cover on top of engine there are 2 coil packs-pull them up off of plugs.
THE SPARK PLUGS ARE UNDER THE INGNITON COIL PACKS MOUNTED ON THE VALVE COVERS. THERE ARE NUTS THAT SECURE THE COIL PACKS, YOU WILL NEED TO REMOVE THESE COVERS TO EXPOSE THE COILS WITH A SPARK PLUG BOOT MOUNTED ON THE END. WHEN REPLACING PLUGS BE VERY CAREFUL NOT TO DAMAGE THE ELECTRODE BOOT. SOME PARTS STORES CARRY REPLACEMENT BOOTS , SOME REQUIRE THE COMPLETE COIL REPLACEMENT WHICH CAN BE VERY EXPENSIVE.
According to the 1998 Mercury Grand Marquis Owner Guide : ( 71.9 litres / 19.0 U.S. gallons )
It's a car.