Could be a bad coil, plug, or injector. Start with the coil first.
At the front of the engine , towards the drivers side of the engine ( power steering fluid reservoir on a 1998 Mercury Grand Marquis )
The 1998 Mercury Grand marquis has the 4.6 liter / 281 cubic inch Single Over Head Cam ( SOHC ) engine from the factory
what is a fire order for 1998 mercury grand marquis
Misfire? Due for a tune up? Check engine light on?
On a 1998 Mercury Grand Marquis : Bank 1 is the passenger side of the engine Sensor 2 is AFTER the exhaust has passed through the catalytic converter
A 1998 Mercury Grand Marquis came from the factory with the 4.6 liter ( 281 cubic inch ) Single Over Head Cam , V8 engine
On a 1998 Mercury Grand Marquis , 4.6 liter V8 engine : firewall 4 - 8 3 - 7 2 - 6 1 - 5 front of vehicle
On a 1998 Mercury Grand Marquis : Bank 2 is the drivers side of the engine Sensor 1 would be in the exhaust close to the engine before the exhaust enters the catalytic converter ( upstream sensor )
Auto Zone will check your computer codes FREE... No more guessing on what problem is. It could be a bad spark plug or wire.
The firewall is the metal wall that divides the engine compartment from the passenger compartment
According to the 1998 Mercury Grand Marquis Owner Guide : ( 71.9 litres / 19.0 U.S. gallons )
According to the 1998 Mercury Grand Marquis Owner Guide : With engine oil filter change ( Motorcraft FL-820-S ) The 4.6 liter V8 engine takes ( 5.0 U.S. quarts / 4.7 litres of 5W-30 )