US & Canada Except California

Checking And Adjusting Idle Speed And CO %, (except Calif)

Preconditions:

Engine oil temperature min. 60°C (140°F)
Intake air sensor must be 20°C (68°F)
All electrical equipment must be OFF
Hose for charcoal filter must be disconnected and blocked at air filter
Dwell and timing OK

Note: When vehicle has been parked outside at temperatures below 10°C (50°F), adjustment must wait until intake air sensor has reached room temperature 20°C (68°F)

Work sequence

- Connect tach/dwell meter according to manufacturer's instructions






- Check idle speed and if necessary adjust with adjusting screw (arrow)
Manual transmission: 800-950 rpm
Automatic transmission: 850-1000 rpm

- Connect CO meter according to manufacturer's instructions
- Connect CO probe ahead of catalytic converter at probe receptacle





- Check CO and if necessary adjust at adjusting screw (arrow)
1.0 ±0.5%

- Secure CO adjusting screw with blue cap

Note: If CO cannot be adjusted following components may be defective:
Injectors
Spark plugs
Vacuum leak between cylinder head and intake manifold