This means that the spark plugs fire in the following order:
1. Cylinder 1
2. Cylinder 3
3. Cylinder 4
4. Cylinder 2
Here's a tip to remember the firing order:
* Start with cylinder 1.
* Then skip a cylinder (go to cylinder 3)
* Then go to the next cylinder (cylinder 4)
* Finally, go back to the first cylinder you skipped (cylinder 2).
This firing order helps ensure smooth and efficient engine operation.