Yup, that's what everyone starts with. The truth is Chrysler has extremely little trouble with their Engine Computers and that should be the last thing on your mind until everything else is ruled out.
The place to start is by reading and recording any diagnostic fault codes. Chrysler makes doing that yourself easier than any other manufacturer. Cycle the ignition switch from "off" to "run" three times within five seconds without cranking the engine, then watch the codes appear in the odometer display.
If there are no fault codes, probably the first suspect would be a plugged catalytic converter. The clue is you'll hear a smooth hiss from the tail pipe instead of the normal "putt putt".
The rough idle shouldn't be overlooked either. If that's due to a misfire, the spark plugs are the most likely cause. How long since they were replaced? Misfires will be detected by the Engine Computer. It will turn on the Check Engine light, and there will be a fault code indicating which cylinder is at fault.
Saturday, February 14th, 2015 AT 9:01 PM