Which piston is the number 1 on a ford 400?

You're asking about the firing order of a Ford 400 engine. It's not about which piston is physically numbered "1." Here's how to determine the number 1 piston:

1. Locate the Distributor:

* The distributor is a key component that sends the spark to the spark plugs.

* Find the distributor cap.

2. Identify the Number 1 Spark Plug Wire:

* Look for a wire on the distributor cap that's marked with "1" or a different color (often red or green) compared to the other wires. This wire is connected to the number 1 spark plug.

3. Find the Number 1 Cylinder:

* The cylinder that the number 1 spark plug wire is connected to is your number 1 cylinder.

4. Firing Order:

* The Ford 400 engine has a firing order of 1-8-4-3-6-5-7-2. This means the spark plug in cylinder 1 fires first, then cylinder 8, then cylinder 4, and so on.

Important Note: Always consult the specific service manual for your Ford 400 engine for accurate information.