Jeep heat is not working and when I am driving has a loud rumbling sound every once in a while.when I am stopped car seems to idle to high and wants to take off by itself.

have the OBD read, sounds like problem with the chassis/suspension/drive train, OBD should give code for the fault

motor mounts. they are readily available.

Common Car Noises and Their Likely Causes Noise More Details Likely Cause Fixing It Clicking noise while turning Starts faint, gradually becomes more noticeable until very loud Failed outer CV joint (constant velocity joint) due to torn boot (most likely) or old age Replace either the whole axle assembly (recommended) or the outer CV joint Water pump noises Difficult to diagnose because of water pump's location Noise usually caused by damage to the bearings in failed water pump Only cure is replacing it. If possible do it at the same time as a timing belt replacement to cut down on labor costs Squeak or squeal from an engine belt Loud, high-pitched squeak or squeal Belts either need adjustment or replacing If belts only squeak when damp, they probably just need adjustment. If they squeak constantly, they probably need to be replaced Exhaust heat shield noises Rattle that you hear when car is idling Damaged heat shield Replace heat shield

Have you checked your oil and fluid levels in the engine and transmisson.
if it's a manual could the clutch be worn out causing the high rpm and thrust bearing noise in the clutch.

The stalling and stopping sounds like the FUEL FILTER. My 84 Reliant was doing the same thing to me. And as soon as i replaced that... The car ran perfect.

Yeah Michael, try tightening the belt on it just a bit tighter. You may not hear slipping belt but it is slipping. But then you say it doesn't work at all at idle, sounds a bit more like a week pump or is too low on fluid. For fluid, just use GM trans fluid, it's cheaper and the same thing as expensive tranny fluid.

Sounds like you have a major vacuum leak someplace under the hood.Look for any hoses that are broken or came off. You should be able to hear aloud hissing noise if you have a vacuum leak,also could have a intake plenum gasket sucked in or a stuck open EGR valve.

Fan motor. Bearings shot.

Sounds like a vacuum leak. Check that all your vacuum lines are attached and in good condition.

Idle prolem could be a dirty throttle body or sticky air idle control motor.
If the Jeep is a 6 cly. the adjustment for the belt is the power steering pump.
If the Jeep is an 8 cyl. the tensioner is on the pass. side of car.