[Outback Porsche]

If there is truly nothing wrong with your dme relay, a new dme relay will give you the same fault symptoms. The fact that you have different symptoms when you use the new dme relay is a worry. It's highly likely that the 'new' relay is a dud, and that the old relay could be faulty.

Try using the wire jumper (as per clarks garage) in place of the relay. If you still have the same fault (starts then dies), check your sensor gap again, check your start switch then try another dme (or send it away to be checked - the dme could have bad solder joints within it).

Cheers,