Air/Fuel Mixture: Adjustments

Overall Inspection Sequence:

Preparation
1. Make sure that the following parts are in good order.

^ Battery
^ Ignition system
^ Engine oil and coolant levels
^ Fuses
^ ECM harness connector
^ Vacuum hoses
^ Air intake system (Oil filler cap, oil level gauge, etc.)
^ Fuel pressure
^ Engine compression
^ EGR valve operation
^ Throttle valve

2. On air conditioner equipped models, checks should be carried out while the air conditioner is "OFF".
3. On automatic transmission equipped model, when checking idle rpm, ignition timing and mixture ratio, checks should be carried out while shift lever is in "N" position.
4. When measuring "CO" percentage, insert probe more than 40 cm (15.7 in) into tail pipe.
5. Turn off headlamps, heater blower, rear defogger.
6. Keep front wheels pointed straight ahead.
7. Make the check after the cooling fan has stopped.

Specific Inspection Procedure

Idle Speed/Ignition Timing/Mixture Ratio Inspection:

Idle Speed/Ignition Timing/Mixture Ratio Inspection:

Idle Speed/Ignition Timing/Mixture Ratio Inspection:

Idle Speed/Ignition Timing/Mixture Ratio Inspection: