Cranks but wont start

What is your question?

05 aviator had check eng. Light blinking had it checked out and replaced spark plug#4 and it was still rough then stalled acts like it wants to start at full throttle position but doesnt checked fuel at rail Good,checked spark Good,checked inertia switchGood,checked relays and fuses, replaced battery wit new one still no start what could it be ? Please help lots of oil leakage.

What makes this problem better or worse?

It cant get worse

How long has your 2005 Lincoln Aviator had this problem?

Over a month