The fuel filter is fine. I just changed it a few thousand miles ago. There are no codes at all. When it runs it runs fine, perfect. The car has premium fuel in it normally if not premium, mid grade. It does get a can of injector cleaner every once in a while as well.
Sometimes it starts and then immediately dies and will not restart. If you turn the key off and turn it to start again it will restart and then die. Wait a few minutes, it never seems to be the same amount of time, and it starts and runs fine.
It's very intermittant and seems be both hot and cold starts. Today I fired it cold and drove to the store about 5 miles away. Went to pick up a few things maybe ten to fifteen minutes, came out and it started and died immediately. Turned over and wouldn't start. Turned the key off and then it started and dies again. Turned it off and waited a few seconds started it and gave it gas before it got back down to idle and it was fine. Drove home no problem. Ffiteen minutes later started and fine. It has done this cold as well. The wife was at work and after her eight hours came out and it wouldn't start. After half an hour of trying it started.
I was suspecting the fuel pump relay after having a 740 that did the same thing and it was very common on the 740. In the fall I pulled out the relay and cleaned it, I also changed the fuel filter at the same time. It went the full winter no problem. This spring it did it again so I changed the fuel pump relay. The day after changing the fuel pump relay, bang, no start. It was fine for a few days and then again no start. Fine for a few days and today no start.
I don't want to throw money at it but it might be my only option.
Any more suggestions would help.