1-4-3-2
This means that the spark plugs fire in that order, starting with cylinder #1 and ending with cylinder #2.
To determine which cylinder is #1, you can:
* Look for the distributor cap. The #1 cylinder will be connected to the distributor cap's terminal closest to the front of the car.
* Find the #1 spark plug. The #1 spark plug will typically be the one closest to the front of the engine.
* Check the engine number. The engine number will be stamped on a plate near the front of the engine block, and it may include a diagram showing the cylinder numbering.
Understanding the firing order is essential for proper engine tuning and troubleshooting.