2007 Jeep Commander Misses

With no other details or observations to go on, there's two things I can recommend. The first is to check for diagnostic fault codes. Chrysler makes doing that yourself real easy. Cycle the ignition switch from "off" to "run" three times within five seconds without cranking the engine, leave it in "run", then watch the code numbers appear in the odometer display.

The second thing, especially if there are no codes stored, is to use a scanner to view live data on a test drive. That may show what changes when the problem occurs. You'll typically need to find a mechanic for the scanner. They're way too expensive for the average car owner to buy.