This is a very common problem with pretty much any Chrysler product and 95% of the time it is usually 2 things. First thing to do is of course clean the throttle body and the IAC motor (Idle Air Control) motor. Second thing is a little strange but is most is the time the problem. When working for Chrysler Dodge Jeep for many years I saw the problem on almost a weekly basis and it will seem kinda crazy but it does work. You need to have your battery checked and most likely replaced. That's because there may be a dead cell in it that is causing the ECM and PCM to lose it's memory settings. Which causes the jeep to crank like normal but not idle and go dead. The battery will seem plenty powerful enough but this is normally the fix. Hope it helps. Thanks
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