You'll find the post by M.B.Doc on Aug 26, 2004 in the thread below an indicator of what the dealer sees on this part.
http://www.peachparts.com/shopforum/showthread.php?t=102232&highlight=replace+5-10+week
Additionally, when my fuel pump failed and the dealer called to confirm they had the vehicle, they initially suspected the CPS. It turned out to be fuel pump failure. Never thought about it again until I caught this topic in the forum.
Is it possible the wound coil has an intermittent "break" or insulation breakdown due to thermal stress or poor wire varnish, etc?