Air/Fuel Mixture: Testing and Inspection
PREPARATION1. Warm up the engine to normal operating temperature.
2. Shift the transaxle into Neutral (MTX) or P position (ATX).
3. Turn off all electrical loads.
^ Headlight
^ Blower motor
^ Rear window defroster
^ Power steering
4. Wait until the coolant fan stops.
INSPECTION
1. Perform "Preparation".
2. Verify that the idle speed and ignition timing are within the specification.
3. Insert an exhaust gas analyzer to the tailpipe.
4. Verify that the CO and HC concentrations are within the regulation.
5. If not, inspect the following.
^ On-board diagnostic system
^ Heated oxygen sensor
^ System inspection
Intake manifold vacuum
Fuel line pressure
Ignition timing control
6. If the systems are normal, replace the three way catalytic converter and/or the warm up three way catalytic converter.