When my CPS went out it was at the track. The car started up but was VERY rough running, like missing, and then died. It did that a second time and the third time I gave it gas and it caught up and ran normal. I couldnt see the CEL behind the Cruise stalk and made two back to back runs before I noticed it. I then drove it home and the next day it wouldnt start at all.

MikeR