Some folks are good with numbers.

Some of us forget our own work phone extensions and occasionally blank on our PIN codes at the bank machine.

For the latter group, OnAllCylinders contributor Lori Sams created this illustrated guide to engine firing orders. Firing order is important because it helps evenly distribute the power strokes along the crankshaft, reducing vibration and providing smoother operation. Many engine and ignition-related projects and repair jobs require that you know the cylinder numbering and firing order of your engine.

8-6-7-5-3-0-9? Nope — that’s not your engine’s correct firing order.

You’d better print out this chart just in case you need it!

Common Engine Firing Orders


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Author: David Fuller

David Fuller is OnAllCylinders' managing editor. During his 20-year career in the auto industry, he has covered a variety of races, shows, and industry events and has authored articles for multiple magazines. He has also partnered with mainstream and trade publications on a wide range of editorial projects. In 2012, he helped establish OnAllCylinders, where he enjoys covering all facets of hot rodding and racing.