I have a 2004 Mercury Sable and my check engine light came yesterday. I went to AutoZone and they diagnosed a cylinder misfiring and said a tune up would be a good place to start and gave me a shop's number. Is that the best place to start? How much (ballpark) should it cost? Where do I go from there if it doesn't work? What does a tune up entail?
Thanks for your time,
Monday, January 17th, 2011 AT 4:52 AM