Need Help with P0304 Misfire
I have an 05 Colorado with 105,000 miles.
Need help with code P0304 # 4 cyl misfire.
So far have changed spark plugs put on new fuel and air filter.
Rented OBDII scanner from autozone.
Deleted all codes and as was pulling in to have inspected after driving for 70 plus miles code came back on P0304.
I swapped the #4 ignition coil with the #5 Coil to see if I would get a P0305, But again after about 55 miles got another P0304.
Truck runs fine, Seems to have nothing wrong just this code that prevents it form passing NC inspection.
Any help or Suggestions greatly appreciated.