Hi there
Test the compression, check it for vacuum leaks. make sure the fuel injection is working. Try swapping the coil on #2 with the one next to it and see if the misfire moves. You can try this with the fuel injector also.
Here is a list of possible causes.
P0302 JEEP - Cylinder Misfire Fault Detected Read more: https://www.autocodes.com/p0302_jeep.html
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