Vanagon F4-1970cc 2.0L (1982)
-
Reconnect idle stabilizer
-
Start engine and while watching the ignition timing, slowly increase engine speed to at least 900 rpm
-
Release throttle
Idle must now be: 850 - 950 rpm
-
If timing setting does not change with changes in rpm, replace idle stabilizer
Note: Before checking or adjusting CO, idle speed and ignition timing must be within specifications
-
Connect CO meter according to manufacturer's instructions
-
Connect CO probe ahead of catalytic converter at probe receptacle
-
Disconnect oxygen sensor (arrow)
-
Check CO; if necessary adjust at CO adjusting screw
0.7 ±0.4%
Note: If CO cannot be adjusted following components may be defective:
Injectors
Spark plugs
Vacuum leak between cylinder head and intake air sensor
-
Reconnect oxygen sensor
CO must be within specifications
-
Secure CO adjusting screw with blue cap