1996 sl1 stalling

My 96 SL1 dies after running for 5 minutes & won't restart. 20 mins. later it will start & run for a few minutes then die again. I changed fuel (http://www.saturnforum.com/forum_posts.asp?TID=2285&PN=1#) filter but no change. It will run a little longer while driving it but just turns off with no warning. Same idling in yard. Where do i go from here?

Try replacing the spark plugs and wires and clean the connections on the coil packs.

Changed plugs,wires and cleaned coil contacts but problem still is still there!