Went to start my jeep, engine did not turn over at all, only sound it made was a few rapid clicks. Check engine light has come on, and have been dealing with random RPM surges when idling and driving. Still did not start when being jumped, went to open the door, the alarm system that came with the vehicle (stopped working years ago I thought) started going off. The battery was disconnected, when reconnected the alarm was still engaged while using the disarm button on the key fob. I am thinking this is a bad starter that needs to be replaced, along with possibly the alternator.
Had a crank, no start before, changed the crankshaft position sensor, jeep ran good for a few days, then back to crank, no start, then codes for camshaft position sensor. Changed that, still no start, has no spark, checked relays and checked coil rail. Everything seems fine, but still wont start. Jeep gets fuel and has good fuel pressure.
Crankshaft position sensors and camshaft position sensors go hand in hand sometimes, from my experience. If one goes bad, may as well change out the other to prevent future issues. If sensors are good and is getting fuel, may want to check into a tune up, if no other codes are present. Other basics to check are battery, alternator and starter. Failing or bad batteries will make Jeeps act up in multiple ways.
Whenever it gets hot, it won't start again after I shut it off and has to sit for about 30 minutes before it will. Seems to be having fuel issue as well even with new fuel pump.