Air/Fuel Mixture: Adjustments

The air/fuel mixture is controlled by the digital motor electronics (DME). The CO-content can only be checked, there are no provisions for adjustment.

1. Run engine to operating temperature.
2. Turn engine off.
3. Remove the test cap at exhaust test ports. The test ports are located in the rear of engine compartment at left and right hand side.
4. Connect a suitable CO tester to test port.
5. Disconnect and plug the air injection air hose at air pump.
6. Run engine (at operating temperature) and measure CO content at idle. CO content should be 0.8 ±0.4%.
7. If test results are not correct, check engine for possible vacuum leaks, mechanical or digital motor electronics (DME) failure (see COMPUTERIZED ENGINE CONTROLS).
8. Disconnect all test equipment and reinstall the CO test port caps. Reconnect the air injection air hose.