Air/Fuel Mixture: Testing and Inspection

Idle Mixture Inspection
1. Perform "Engine Tune-up Preparation". (See Engine Tune-up Preparation.) Testing and Inspection
2. Verify that the idle speed and ignition timing are within the specification. (See Ignition Timing Inspection.) Testing and Inspection (See Idle Speed Inspection.) Testing and Inspection
3. Insert an exhaust gas analyzer into the tailpipe.
4. Verify that the CO and HC concentrations are within the specified regulation.
^ If not within the regulation, refer to "ENGINE SYMPTOM TROUBLESHOOTING". (See SYMPTOM DIAGNOSTIC INDEX [MZI-3.7].)

Idle mixture
HC concentration: Within the regulation
CO concentration: Within the regulation