won't start
 

Hello- I have a 1995 Explorer XLT with the 4.0 liter engine. Occasionally when parked on a slight incline with the nose up and rear down, it wont turn over. Cranks and cranks but won't start. I had to leave it over night parked on a very slight incline. Went back next day did not start. Pushed it out of the space to a more level part of the lot, started right up. What's up with this?
Thanks,

Welcome to the site..

Do you hear the fuel pump audible hum for a few seconds when the key is Cycled On?
Still the OE pump?
Not necessarily an angled or incline issue, but pump failure is fairly common on higher mileage rigs.. They tend to be intermittent as well.. I’d try and verify pump run, as least to rule it out before moving ahead.
If it’s parked on an incline and doesn’t start, have a helper cycle the key On, and listen into the open fuel fill neck or from underside of the rig near the fuel tank.
Any audible run? If not, cycle the key continuous or bettter yet just as the key is cycled On,, ( pump run is timed) very firmly bump the bottom of the fuel tank. If the pump then runs, then the pumps failing. If the pump runs even on the inclines and a still a no start condition, I’d verify spark is present during an event...

Got it back home in the garage and it won't start again. I will Ck fuel pump but I'm sure that's it. Fuel pump last change about 15-18 years ago. It has approx 200K miles on it.
Thanks for the info.

Now it started. Could it be the inertia switch?
Thank you for your replys

Inertia don't fail very often.

What you could do to rule out power distribution to the pump is,, Have a test light or meter on the inertia connector (showing applied current) at all times.
On a fail look to see if there's a drop out in the systems power distribution to/through the inertia..