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What is the firing order on a 1600 air cooled motor?

The firing order for a 1600cc air-cooled Volkswagen engine (commonly found in Beetles, Buses, and other models) is:

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.