P0302 Jeep grand 4.0

Question

my coil pack and rubber boots looked fine,i put all new plugs in cleaned trottle body and ?AIE OR IAE SENSOR WITH SMALL PISTON IS ALL SUPER CLEAN my buddy wants me to put A new coil pack on but its a $100 whaT if thAts noT THE PROBLE . i have loss of horse power,all new plugs . and im getting horrable gas milage . what wlse could it be . i want to buy a fuel injection cleaning kit cause i think its 50$ pluse per injector if this was ur car what would u do.

Answer 1

P0302 Misfire number 2 cylinder

The best way is to test the ignition system. with a ignition analyzer,you can have a test performed

 the ignition is the most promising problem that would set a misfire condition, buy one and try it out and see if you can return it.