Customer complaint CEL on and runs rough. Code P0300 Random Misfire. Check misfire history Cyl #6 has 642 mifires, cyl# 7 has 4274 misfires, Cyl#8 has 4024 misfires. The rest of the cyl have less than 100 each. Fuel trim bank 1 at 25% bank 2 at -14%. Clear cod... Login to read more.