I had valve work done on my S because of severe sputtering. I am the original owner and I don't baby it but it is an every day driver. I love it. The dealer sent the work out and they did a good job. New plugs, map sensor,etc. It still had minor hesitation - cold or hot - when I got it back. It was checked again and one of the cylinders had a bad coil. That was replaced and it runs beautifully. If you have this problem, make sure you 've also measured the spark on each plug because it does not show on the computer code and you need to watch for it. I'm impressed with my dealership. They actually can work on the S - not many do a good job or care.
drive with attitude

 

Wow, this is the first time i've heard the stealership actually fixed something, i'm amazed.

 

A local dealer boasted about the performance the S achieves with FWD...