I'm going through the same sort of problem, only my car starts up but stalls outs, and had a hard time keeping idle. I just did some of the testing you are looking to do and its pointing to a slowly dying pump on my car. The relay you're looking for is in the box on the passenger side where the DME is. Its buried underneath a bunch of other wire connectors and you'll have to pull up the plastic rack that they're all connected to in order to get at the relay. In my car it was blue and of the three relays, it was closest to the engine, making it the toughest to get at. Its not difficult to get to, but you may have to dissconnect some wires to get at it. Jump connections for pins 30 and 87. The pump should run as long as the battery is hooked up.

If you do this you should also test power to the pump. If the car isn't starting, chances are testing pressure probably isn't needed. But if the pump runs when you bypass it, you should consider putting together a gauge and tapping into the fuel lines to test pressure.

Have you changed your fuel filters? It won't help if you have a dead pump, but do this if/when you change the pump.

I don't know anything about the crank position sensor except that its somewhere lower on my list of possible causes for my problem.

Hope this helps,

Bryan