THE BEECHMONT CREST AUTOMOTIVE LEARNING ZONE
Cylinder Firing Order
The sequence in which the cylinders fire. The firing order is determined by the relative positions of the crankshaft rod journals. The cylinder firing order should be noted in the vehicle’s service manual. It may also be indicated on the engine intake manifold.
The cylinder firing order is important when working on the vehicle’s ignition system, replacing spark plug wires, or other tasks associated with an engine tune-up.