What is required of a "Full" tune-up, assuming I need to do a full tune -up? Engine Light on and per diagnostic tool says Nbr 4 cylinder misfiring.
2000 Mercury Grand Marquee
Running a little rough, especially uphill. Don't want to spend to much as giving it to a friend, but want it in a good enough shape that it won't leave his wife and children stranded on the road.
Replace the spark plugs and the spark plug boots. Inspect air filter and PCV valve, replace as needed. Replace the fuel filter. HTH. -Jim
The 4.6 loves new plugs, it wakes them right up
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