[Kris]

I've come accross a problem with my 81 280zx...
If I let the car go for 15ish hours without starting it, and go to start it, it will crank, but wont start. Then if I leave it sit for another 5ish hours, it will start right up. I've also noticed the same problem if I park it at an angle where the passanger side slants downward.
I've checked for a spark, and its there.

 

[ed]

wow! this sounds like a good one, but actually i had the same problem on my sisters corrolla. it was a bad starter. i dont know about the 15ish hour thing though. but when my sis corrolla was at a slight tilt the starter would catch. the next time its at a tilt and wont start, try banging on the starter and see if it works after that.