1. Gather Your Tools:
* Timing Light: Essential for accurately setting the timing.
* Socket Set and Wrenches: For accessing distributor and other components.
* Spark Plug Wrench: For removing and reinstalling spark plugs (optional, but recommended).
* Owner's Manual (if available): This will provide the specific timing specifications for your engine. The recommended timing will vary by engine type and even sometimes by the specific engine's serial number.
* Vacuum Gauge (optional but highly recommended): Helps ensure proper engine vacuum and aids in identifying potential problems. A good vacuum reading means your engine is healthy.
* Chilton's or Haynes Repair Manual (recommended): These manuals provide detailed instructions and diagrams specific to your Mustang's year and engine.
2. Safety Precautions:
* Disconnect the negative battery cable before working on any electrical components.
* Work in a well-ventilated area.
* Wear safety glasses.
3. Prepare the Engine:
* Warm up the engine: Run the engine until it reaches normal operating temperature (usually indicated by the temperature gauge). This is crucial for accurate timing.
* Locate the timing marks: On the harmonic balancer (pulley at the front of the engine), you'll find marks indicating degrees of crankshaft rotation (often 0, 10, 20, etc.). You'll also need to find the timing pointer on the timing cover.
4. Setting the Timing:
* Connect the timing light: Clip the timing light's inductive clamp onto a spark plug wire (usually the #1 cylinder wire).
* Start the engine: With the engine running, shine the timing light onto the timing marks. The light will "freeze" the crankshaft position, allowing you to see where the timing marks line up.
* Adjust the distributor: Loosen the distributor hold-down clamp. While looking at the timing marks through the timing light, carefully rotate the distributor slightly. This will change the ignition timing.
* Match the timing marks: Adjust the distributor until the timing mark on the harmonic balancer aligns with the timing pointer (at idle, with the vacuum advance disconnected). The exact degree of advance will depend on your engine (see your manual).
* Reconnect the vacuum advance: Once the base timing is set, reconnect the vacuum advance line to the distributor. Your vacuum gauge can help confirm this is working correctly.
* Check the timing at higher RPMs: Some engines require timing adjustment at higher RPMs as well. You may need to adjust the centrifugal advance mechanism (usually inside the distributor) for this, but this is more advanced and best left to someone with experience.
5. Double-Check:
* Re-check the timing several times to ensure the setting is accurate.
* Test drive the vehicle: After setting the timing, test drive the vehicle to ensure that it runs smoothly.
Important Considerations:
* Engine Type: The procedure may vary slightly for 6-cylinder and V8 engines. Consult a repair manual specific to your engine.
* Ignition System: The type of ignition system (points, electronic) might slightly alter the process.
* Vacuum Advance: Make sure you understand how the vacuum advance system works and how to properly disconnect and reconnect it during the timing process.
Strongly Recommended: If you're not comfortable working with your car's ignition system, it's best to consult a qualified mechanic. Incorrectly setting the timing can damage your engine. A repair manual specific to your 1967 Mustang is a great investment if you plan to do any car maintenance.
