ENGINE TUNE-UP[L3]
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Engine Tune-up Preparation
1. Turn off the electrical loads.
2. Warm up the engine as follows.
3. Connect the M-MDS to the DLC‐2.
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Ignition Timing Inspection
1. Verify that the ignition timing (M-MDS: SPARKADV PID) is within the specification using M-MDS.
2. Verify that ignition timing advances when the engine speed increases gradually.
Idle Speed Inspection
1. Verify that the idle speed (M-MDS: RPM PID) is within the specification using M-MDS.
Idle Mixture Inspection
1. Verify that the idle speed and ignition timing are within the specification. (See Idle Speed Inspection.) (See Ignition Timing Inspection.)
2. Insert an exhaust gas analyzer to the tailpipe.
3. Verify that the CO and HC concentrations are within the regulation.