as far as the little things, a good tune up is good. I seafoam my car ever couple of months to clean the engine out. It not as boggy afterwards. You could also get a cold air intake or find a way to connect an cold air intake filter onto your intake.
It may be your Water pump, but if it was leaking you would notice your car heating up. If you recently had a waterpump installed, the gasket may have been put on incorrectly and in turn caused it to leak. But it would leak all the time as long as engine is running. You should make sure none of...
You would want to fix anything that is wrong with it, and then work your way up from there. Suspension is a good idea also, as you might want to lower your car a little. Also you may consider engine modifications, such as adding Headers to make the car sound a little deeper, and get some...
Sound like the alternator cant charge the battery, you should get it check at an auto parts store, and take the battery while your at it. It should be free to check. Those are really the only two culprits if the Jeep was working fine before and was not tampered with.