I'm having the same stalling, missing, rough idle, hard start, issues as many others here with my 97 Astro AWD. So far I've replaced the spark plugs, wires, cap and rotor, wires again with better ones, and coil. Although all that has helped, I still have a bit of the same symptoms. Ok, so I covered all of the basic tune-up items plus a new coil. The arcing has gone away but my van is still running rough. After re-checking the fuel pressure, I feel that the current issue is with the fuel pressure regulator so I replaced that too. Now I've read a ton of forum posts on this issue and at on point I came across a post that talked about an upgraded fuel injector pack. My thinking is that since I've read so many posts about this engine having issues with the poppet nozzles, that I should go ahead and invest $260.00 on the upgrade as long as I have the plenum off for the fuel pressure regulator anyway. I'll try to post some pics to give you a better idea of what the new injectors look like. I'm installing these over the Christmas holliday so I'll post afterwards to let anyone who's interested know how things went.