1 is not firing at all what else could the problem be?
P2302 code changed plugs and coils, what else could be the issue? on 2004 Jeep Liberty
you poss have an inj issue or wiring to it get a diag and est to save tme and $
1 more answer
possible faulty fuel injector....but i would perform a compression check to be sure the engine is in good condition.