94 Jeep Grand Cherokee 6cyl, auto. Have power at the coil but no ground. Have good fuel pressure. Checked the wiring. Could not find a broken wire. Replaced the PCM, crank and cam sensors. Just got the wiring wrapped back up. What else can I check? At a loss for words. Everything I check seems to be working except the coil ground. The PCM communicates with the scan tool and shows the sensors doing there job.

SOURCE: R & R Cylinder heads on 94 Rodeo 3.2 6Cyl

have a true mechanic do it you screw up on the cams and the engine will be junk

SOURCE: 94 Jeep Grand Cherokee heater coil has been replaced wont start

If you have a security system, close all the doors and then lock the drivers door with the key, then unlock it. That should re-set the system. I've had the computer completely disconnected from mine several times (used it to check another vehicle) and I don't have security...it started and ran fine...only difference between the two is the security so I'd try that.

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.

SOURCE: 99 jeep grand cherokee no start 4.0L no power to

Check the auto shut down (ASD) relay located in the power distribution box.