How do you replace spark plugs on a 1997 grand marquis?
Disconnect the car battery, disconnect the spark plug cables, and remove the old spark plugs. Next put in the new spark plugs, re-connect the spark plug cables and connect the car battery.
To change spark plugs a person must start with a car that is off, then disconnect the batter. The person must then remove the spark plug cables, remove the spark plugs, and replace them with new spark plugs. After that, one must put the spark plug cables back in the correct order, then connect the battery.
The detection of engine oil on the spark plugs of the 2000 Ford/Mercury Grand Marquis is indicative of a mechanical condition. This is a common symptom of worn valve seals or possibly the guides. This wear may be allowing for excess oil to flow back into the cylinder. This can result in emissions problems and or higher engine oil consumption.