Ok,

I have a 1994 Volvo 850 Turbo with ~200k miles. I was about to go get a neutral switch, but now I think I might have more and or different issues.I'll list symptoms below:
-For the last year, I can't shift out of park unless I hold in the shiftlock override button.
-In the past, the car has had problems starting. The car will crank just fine, but won't kick over. I did the ratcheting of the shifter and car starts but up arrow is flashing. It usually went away on its own the next time I started and wouldn't happen for quite a while.
- This summer, on very hot days the ABS and TRACS lights would come on. The next time I ran, they would be off. Hasn't happened again since weather cooled down.
- This Monday, the crank but no start issue came back. I would ratchet the gear shifter for a while and the car would start with the up arrow blinking. The last few times I've started the car I had the crank but no start issue.

CURRENT STATUS:
- Yesterday as I was leaving work, the car wouldn't start again. This time, once I ratcheted the gear shifter for a while, the car started but then died after 2 or 3 seconds. I heard a "click" under the hood right before it died. Same thing happened 2 more times. I decided that if maybe I shifted into drive as soon as the car started, maybe that would help. I got it started again and shifted. Success! I shifted from drive to reverse several times, then backed out of my space. I then shifted to drive to start on my merry way and the car died again!

What in the world could be the issue? I understand now that a PNP issue wouldn't even allow the starter to crank, so I have no idea why the ratcheting of the gear shift has helped before.

Any help would be greatly appreciated.