ENGINE TUNE-UP[AJ (3.0L Duratec)]

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Engine Tune-up Preparation

1.  Turn off the electrical loads.

2.  Warm up the engine.

(1)  Increase the engine speed to between 2,500 and 3,000 rpm until the main fan and additional fan start operating.

(2)  When the main fan and additional fan start operating, release the accelerator pedal and wait until the fans stop operating.

3.  Connect the M-MDS to the DLC-2.

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Ignition Timing Inspection

Note

•  Ignition timing is not adjustable.

•  Ignition timing verification requires M-MDS.

1.  Perform the engine tune-up preparation.

2.  Verify that the ignition timing (M-MDS: SPARKADV PID) is within the specification using M-MDS.

3.  Verify that ignition timing advances when the engine speed increases gradually.

•  If there is malfunction, refer to “ENGINE SYMPTOM TROUBLESHOOTING”. (See ENGINE SYMPTOM TROUBLESHOOTING[AJ (3.0L Duratec)].)

Idle Speed Inspection

Note

•  Idle speed is not adjustable.

•  Idle speed verification requires M-MDS.

1.  Perform the engine tune-up preparation.

2.  Verify that the idle speed (M-MDS: RPM PID) is within the specification using M-MDS.

•  If there is malfunction, refer to “ENGINE SYMPTOM TROUBLESHOOTING”. (See ENGINE SYMPTOM TROUBLESHOOTING[AJ (3.0L Duratec)].)

Idle Mixture Inspection

1.  Warm up the engine.

(1)  Increase the engine speed to between 2,500 and 3,000 rpm until the main fan and additional fan start operating.

(2)  When the main fan and additional fan start operating, release the accelerator pedal and wait until the fans stop operating.

2.  Insert an exhaust gas analyzer to the tailpipe.

3.  Verify that the CO and HC concentrations are within the regulation.

•  If there is malfunction, refer to “ENGINE SYMPTOM TROUBLESHOOTING”. (See ENGINE SYMPTOM TROUBLESHOOTING[AJ (3.0L Duratec)].)