I have a 96 Cherokee sport with 201000 miles. I have replaced the crank sensor, throttle position sensor, distributor, plugs and wires, and also the fuel pump. It turns over but doesn't fire. Any help would be greatly appreciated. It has the high output 4.0. Thank you

 

You need to determine what you are missing. Spark or fuel. Don't throw any more parts at this; not very efficient and as you are finding, it becomes expensive in a hurry. You need to "test" your way to a solution.

The FIRST thing I do for any no-start is this simple test. Pull a spark plug, keep it attached to the plug wire, place the plug electrode near a good engine ground, have a buddy crank the engine while you watch. You are looking for a strong, blue, snapping spark. Yellow/orange/white indicates a weak spark, which may not be strong enough to start the engine. Knowing whether you have good spark, no spark, or weak spark is really important here.......

Also, do you HEAR the fuel pump energize and run for about 2 seconds when you turn the key to the ON position? Another quick and dirty test that tells you a lot. If you don't hear that fuel pump come on and you have already replaced the fuel pump, you have a problem with the "CONTROL ELECTRONICS" that deliver power to the fuel pump.

Report back what you find..............