Four cylinder firing order 4 cylinder in-line engine 🤩🤔 How to work ?

Four cylinder firing order || 4 cylinder in line engine 🤩🤔 How to work ?

Most 4-cylinder engines have a firing order of 1-3-4-2 although other firing orders such as 1-3-2-4, 1-4-3-2, 1-2-4-3 are possible. Consider the inline 4 engine in Figure 1. The cylinders are usually numbered 1234 from the front of the engine where the accessory drives (pulleys) are installed.