Thanks for getting back on this. It's a 2000 year Extreme. Would the CAT being off not show up for 3200 miles? If I can get it to not start I'll try several things like plugging the tail pipe and looking at the spark but it never happens at home or in a place I can try things like that. There is no security light on and when it's not starting, it will kick just enough to make you think it's starting but it don't. I pulled the coil packs and they ohmed out OK. I replaced the crank sensor, water temp sensor, and air inlet sensor last week. I don't think it helped because yesterday I drove 2 miles and shut it off for about 45 minutes and it cranked about 10 seconds before finally catching on. I wasn't at home so I didn't push my luck. Of course when I got home and left it for 2 hours and tried it, the damned thing started, not on the first revolution but it started. I've read the 2000 2.2 didn't have a cam sensor. If it does I'll change it. I haven't changed the MAP sensor yet because it's a little more expensive. I can get one from a friend though if it'a a possibility.