If your car, truck, or SUV has a 5.7-liter ... computer and goes in the sequence 1-8-4-3-6-5-7-2. The cylinder arrangement and firing order are the same for all third-generation HEMI engines ...

For instance, it can choose to fire every third cylinder. So in the firing order, every third cylinder fires, and the two preceding and following are shut off. And it just keeps following that ...