Run a compression test, and a cylinder leak down test to see what type of shape your engine is in. Also, check the wires going to the coil rail to make sure they aren't shorted. Sometimes on the 4.0 the coil rail wires rub on the back of the cylinder head and in turn can damage the wires. I'd also look there.
Some say a comet will fall from the sky.
Followed by meteor showers and tidal waves.
Followed by faultlines that cannot sit still.
Followed by millions of dumbfounded dipsh**s.