New to the site and Jeep world and looking for some input. I recently picked up a 99 XJ with the 4.0l in it. Approximately 155,000 miles on it. I bought it knowing it had the CEL on and misfire on cylinder 5. Plugs, cap, wires all did nothing. Ohm check on the injector was good as well as the fuel pressure. So today I pulled off the valve cover and the rocker/pushrod on #5 intake is loose. I can move them maybe a half inch up and down by hand. And when the engine is started it is not operational. Is this definitely a bad lifter? Could it just be hung up or is the head going to have to be removed and replace lifters? Is there something else causing the problem that I could be overlooking? Hoping its not too major. Thanks for any insight.