Autolite - Excess Engine Oil

A Four-Cylinder Engine With ignition coils over the spark plugs, or coil on plug, has misfire code for cylinder three or P0303, the plug has a dark grey matte coating on the spark plug insulator what is the least likely cause of the spark : a) Spark Plug b) Leaking fuel injector in cylinder 3 c) Carbon deposits on the intake valves d) MAF Sensor defective