Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2007 Mazda CX-9 V6-3.5LFACTORY OEM SERVICE PROCEDURE
Ignition Timing: Testing and Inspection
Ignition Timing Inspection
1. Perform "Engine Tune-up Preparation". (See Engine Tune-up Preparation.) Testing and Inspection
Note
^ The ignition timing cannot be adjusted.
^ The M-MDS is required to verify the ignition timing.
2. Verify that the ignition timing (M-MDS: SPARKADV) is within the specification using M-MDS function.
Ignition timing
Approx. BTDC 13°
3. Verify that ignition timing advances when the engine speed increases gradually.
^ If it is not within the specification, refer to "ENGINE SYMPTOM TROUBLESHOOTING".
1. Perform "Engine Tune-up Preparation". (See Engine Tune-up Preparation.) Testing and Inspection
Note
^ The ignition timing cannot be adjusted.
^ The M-MDS is required to verify the ignition timing.
2. Verify that the ignition timing (M-MDS: SPARKADV) is within the specification using M-MDS function.
Ignition timing
Approx. BTDC 13°
3. Verify that ignition timing advances when the engine speed increases gradually.
^ If it is not within the specification, refer to "ENGINE SYMPTOM TROUBLESHOOTING".
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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