Im not getting fire on my 2001 jeep cherokee. coil rail is good and the cam position sensor is new and still no fire. im getting fuel but i think there is no fire. any idea as to what im overlooking? jeep has 148,389miles and was parked one night . when we came out to start it the next day all it does is crank over but no start. have checked for fire , fuel , and all connections. they all seem good! have put new cam position sensor, and checked the coil rail (seems good), and also checked to see if the cam shaft is turning (it is). the jeep is very well maintained and is not for off road. so it is not run hard. it just was parked one day and never would start the next. all things point to the pcm going bad and if this is the case . do you have to reprogram the replacement pcm before it will work? and if so how can this be done? also could there also be a problem with the ignition switch that could be causing this?

SOURCE: 1996 Jeep Grand Cherokee no start

I just fixed the problem with the 96.

Crank no start
No fuel pressure
No spark
No volt gauge and no fuel gauge
No scanner obd working when hooked up says error no communication. With the help of this awesome guy randy from washington, i did some relay jumping, more wire tracing and found it was the crank sensor was shorting out with just the key on. with key on, locate the crank sensor behind the valve cover, unplug it and see if everything comes back on, this is what it did for me. Thanks again randy for the help and this gentleman can be reached @ http://www.aceautomotive1.com.

SOURCE: no spark at coil

check ignition pick-up coil and ignition module

SOURCE: 99 jeep cherokee died going down the road. will not start. has fuel but no fire

Check spark to plugs. Possible crankshaft position sensor. Located at rear of engine between engine and trans.

SOURCE: where is the pcm on 1997 jeep grand cherokee 6 cyl?

I don't think the PCM is your problem, is the check engine light on? It could be you idle air control motor this is located on the throttle body, but because this happens while driving I am thinking you will need to replace your crank shaft position sensor it is located on the transmissinon bell housing it is very hard to replace without the correct tools. If the check engine light is on take it to a local auto parts store and ask if they can check the check engine codes for you they usally will do this for free.

SOURCE: 1998 jeep cherokee no start seems that pcm is not

I had a similar problem with my 98 Cherokee and after a month in the shop, it turned out to be a short in the wiring harness.