Engine Tune-Up [Lf]; Engine Tune-Up Preparation; Ignition Timing Inspection; Idle Speed Inspection - Mazda 3 Workshop Manual

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes

Engine Tune-up Preparation

1. Turn off all electrical loads.
2. Warm up the engine as follows.
(1) Start the engine.
(2) Maintain the engine speed 2,500-3,000 rpm until the cooling fans start to operate.
(3) Release the accelerator pedal.
(4) Wait until the cooling fans stop.
3. Connect the SST (WDS or equivalent) to the DLC-2.

Ignition Timing Inspection

Note
• Ignition timing is not adjustable.
• Ignition timing verification requires WDS or equivalent.
1. Verify that the ignition timing (WDS: SPARKADV PID) is within the specification using WDS or
equivalent.
Ignition timing
Approx. BTDC 8°
2. Verify that ignition timing advances when the engine speed increases gradually.

Idle Speed Inspection

Note
• Idle speed is not adjustable.
• Idle speed verification requires WDS or equivalent.
1. Verify that the idle speed (WDS: RPM PID) is within the specification using WDS or equivalent.
Idle speed
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ENGINE TUNE-UP [LF]

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