I have a problem that I hope someone can help me with. 1999 jeep Cherokee 4.0 Started up and drove around town normally ,no hesitation, misses or backfires. Cut jeep off ,sat in driveway a few hours listening to tunes. Next morning car would crank strong but would not start. Checked battery, It was normal for prolonged starting attempt. hooked charger up for a couple of hours. Tried again, good crank, no start.

Checked coil with spark plug to ground, good sequenced spark. Checked individual plugs, good spark. Placed screwdriver in choke and sprayed starter fluid. No signs of start. I have noid lights but I figured if starting fluid down the throat wouldn’t do it. Its not a fuel problem, Engine wasn’t missing a beat before This it’s a daily driver for a retiree. Head replaced January ’16 . Fuel injector changed in summer of “16 for upgrade.
There is no check engine light. Oil changed on time , No overheating last summer.. Only (smal problem l) fuel rail wouldn’t hold fuel. Had to use double key trick to start. Strange, remote start started right away. (Curious) not a problem though. Fuel pump change a year ago..
Permanent fuel pressure mod on fuel rail..