It might be an exhaust leak
There can be several things that will cause your 1994 Jeep grand Cherokee to make a loud clanking noise when you drive it. The most common cause is a bad u-joint.
Dead battery? Maybe if it makes clicking noise -dead battery
Have you changed your oil lately? You can try adding 10/40 wt. oil the next time you change oil.
I hear a clicking noise coming from my jeep when I hit speeds greater then 50 MPH? any ideas on what can cause this
clicking noise when trying to sart engine usually indicates a flat battery.if the battery is not the problem ,the starter motor needs repair.
cv joints
possible brake or wheel bearing problem
Check the front driveshaft.
I had a similar problem with my 96 classic. I took it to a couple of different mechanics and none of them found a real mechanical issue with it. But one of them did tell me that as these jeep engines age they need better fuel or else they make noise. So he recommended that i use a higher grade octane. It seemed to fix the problem. As gas prices rose i would only use the high grade every now and then, the grinding noise on acceleration still happened but not nearly as frequent.
Yes, the purge valve clicks.
A 1991 Jeep Cherokee computer is what fits a 1991 Jeep Cherokee.
Bad Struts