924 L4-1983cc 2.0L SOHC (1982)
Air/Fuel Mixture: Adjustments
924 & 944
81 - 86
Perform the following adjustments with all electrical equipment off. Perform all adjustments as quickly as possible to prevent heating up exhaust ports
which would affect emissions.
1. Warm engine to normal operating temperature.
2. Connect suitable CO measuring equipment to exhaust system test port following manufacturer's instructions.
3. Pull off rubber cap on oxygen sensor plug, then disconnect plug.
4. Measure CO content. CO content should be 0.4 - 0.8% by volume.
5. If CO content is not within specifications, adjust by turning mixture adjustment screw as necessary on air flow sensor.
If mixture requires adjustment, access must be gained to mixture adjustment screw as it is sealed with a concealment plug at the factory.
