What is the firing order and spark plug on a ford 1992 4.9 liter six cylinder?

The firing order for a 1992 Ford 4.9L six-cylinder engine is 1-5-3-6-2-4. The spark plugs are located on the top of the engine, and they are numbered from front to back on each side. The spark plug wires are also numbered, and they should be connected to the spark plugs in the correct order.

Here are the steps to replace the spark plugs on a 1992 Ford 4.9L six-cylinder engine:

1. Disconnect the negative battery terminal.

2. Remove the air cleaner cover.

3. Remove the spark plug wires by pulling them straight up off of the spark plugs.

4. Use a spark plug wrench to loosen and remove the spark plugs.

5. Install the new spark plugs by hand until they are snug.

6. Tighten the spark plugs with a spark plug wrench until they are snug.

7. Reconnect the spark plug wires.

8. Reinstall the air cleaner cover.

9. Reconnect the negative battery terminal.

Please note that the spark plugs should be replaced every 30,000 miles or every three years, whichever comes first.