94 LS400 with new starter.
I left for the weekend. The car has 1/2 tank of gas. It was parked nose-down on a slope.
Now, after returning, car cranks but will not start.
Always before, it started immediately.

Please give me some pointers on what I should check.

 

how much of a slope? could be the really odd scenario where it's on a steep slope with not enough gas in the tank to reach the pickup?

heard of it happened to a few friends in SF, they learned to always keep >2/3 tank in their cars (not LS')

cheap way to see if that's the problem is to use a gas can and shove a couple more gallons into it...