Join Date: Feb 2009
Location: Northeastern BC
+1 on what taisa899 said.
Also, the times when it doesn't start -- when you turn the key to the start position, can you hear the starter solenoid clicking or rattling, or is it silent?
If it's quiet, this might suggest your starter solenoid is sticking. Next time it happens, give it a few light raps with a screwdriver handle. If that doesn't work, try bypassing the solenoid by jumpering across the two large studs, to see if you can start it that way.
If Princess Auto were a real girl, I'd ask her to marry me.