* Many Engines: "23 liter" doesn't tell us the specific model. Ford/Mercury used a wide range of 23-liter (approximately 140 cubic inch) engines in the 1970s. Each engine could have a different firing order.
* Safety: This information is critical for proper engine operation and can be dangerous to get wrong.
How to Find the Correct Firing Order:
1. Identify the Engine: You need to find the exact engine code or model number. Look on the engine itself for a cast-in number or find it on your vehicle's documentation.
2. Consult a Repair Manual: Once you know the specific engine, find a reliable repair manual (Chilton, Haynes, etc.) that covers your vehicle. These manuals contain accurate firing order information.
3. Online Resources: There are many automotive websites and forums where you can find information by searching for your engine model and year. Be sure to confirm the information with a reputable source.
Remember: Incorrect firing order can cause misfiring, engine damage, and potentially unsafe operation. Always double-check the information before working on your vehicle.
