240 starts then stops
 

1993 240 wagon.
The nature of this problem has changed some over the last two years (yes, I've been struggling with it that long) Currently it fires right up then dies immediately. Seems like it has no fuel.Sometimes you can get it to stay running and then it might run all day but if you shut it down it might not restart or it could just die on you, just like someone reached over and turned the key off.

I am trying to quick test the in-tank pump. I removed fuse 4 and jumpered from right side of 6 back to 4 terminal. Turn the key to position #2 and all I hear is a brief whirring sound coming from the external high pressure pump. What do you make of this?

Thanks, I really need some help.

Arne