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.

Asked by LouNawlns Apr 07, 2015 at 09:44 AM about the 2000 Mercury Grand Marquis LS

Question type: Maintenance & Repair

2000 Mercury Grand Marquee
170,000 miles
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.

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