I scanned my truck at autozone and it said PO304 which is a #4 missfire and PO203 which was #3 injector something, i didn't write it down cuz I knew my haynes would have it BUT it don't. Here's the story 03 2.2 started skipping I replaced the plugs and wires, seen that the coils were cracked so I replaced them, nothing. I replaced the fuel filter as well, no help but it needed it anyway. At first it was #4 skipping so after that I put in some lucas fuel injector cleaner and it threw the #3 code. I'm confused but I'm gonna rent a fuel pressure and compression tester tommorow and check it friday. Anyone have a clue of what it might be?