This is what I usually do during the day. Start up, drop into drive and go to the gym. No issues. Be done with my workout 2 hours later. Get in, start up, put XJ in drive and try to drive off. As soon as my foot hit the throttle, there is a loud ticking noise that comes from under the hood. I would then let off the go pedal and feather the noise away and everything is fine for the trip. The noise will return after every start up for the day.

I have ruled out the following: hood release cable, ATF lines,and Coolant overflow line being caught in the fan.

The noise cannot be replicated while the jeep is neutral and revving the crap out it. I has to be in drive.

The noise sound like a pipe falling into the fan.

Please help me diagnose this phenomenon.

 

Broken motor mount?

 

doubtful, This noise is tick or pop, the noise happens about .5 seconds apart and is loud. i remember a before winter came, i left the throttle down until i got either a cylinder 3 misfire and cylinder 6 misfire.

do you guys think this is related to TSP #18-031-03: hot start misfire?
http://www.naxja.org/forum/showthrea...ight=heat+soak

 

If it is a heat soak related number three cylinder misfire, the car will do more than just make noise, it will run really rough for about thirty seconds to a minute until the vaporized fuel leaves the injector. Are you sure it isn't a sticking lifter? If so it will sould like the car in this video. I realize that the car in the video is not a Cherokee, but the noise in the video is comperable.