94 jeep grand cherokee ignition coil

SOURCE: 96 jeep grand cherokee 4.0

for testing, there are some u-tube videos that show each circuit being tested under load. 5v, sensor ground, and sensor signal. need a good meter to check those"hall effect switch" sensors.after trying evrything, THEN buy a pcm and get it flashed with the update. WOT during crank for tests unless u want to disable the fuel pump at the relays for the time of ckp and cam tests

SOURCE: Jeep Hesitates. P0303 code

Check the cylinders Commpression. over 115 psi is good, 120 psi is normal.

SOURCE: 1989 jeep cherokee

keemo68 is right, I had the same prblm and it was one of the relays. There are 4 relays located under the hood, passenger side, just above the wheel. They're quite cheap so buy one, then replace the first one, if still not ok put it back in place and try to replace the second one, til you find the defective one. Think I've paid $5-$6 in a wholesale electronics parts, they're quite standard.

SOURCE: 1994 jeep wrangler no fire

Crank position sensor has a higher failure rate than it should...however i would not change it "at random" Check for continuity between b&c terminals of the sensor with a digital ohmeter.
There should be no continuity between them (b&c should be marked on connector) No continuity reading is same as when probes are not connected to each other.
I really dislike when people try and help and use terms that owners can't understand ... "check your zxy and qtr then add an abc" dosen't seem helpful. I hope I am as clear as I can be!!!
Good luck.

SOURCE: I have replace the spark plugs, wires, coil, crank...

You replaced all kinds of parts for no reason. Do you really think, at this time,that even one item was your problem.
I would suggest going to a repair shop,as you already spent more than, that would have cost,in the first place.