Adjustment
1. Warm up the engine to operating temperature.
2. Remove air filter.
3. Connect a tachometer to the engine (with the ignition off) and gas analyzer. On an engine with a displacement of 1.3 dm3, the gas analyzer is connected to the intake pipe in the engine compartment, which is located on the exhaust pipe and is closed with a plug.
CVH engines with a displacement of 1.3 and 1.6 dm3
4. Push throttle lever (2) and close the air dampers (1).
5. Release the throttle actuator lever, as a result of which the stepped washer is fixed.
6. Release the air dampers, which should be in the fully open position.
7. Start the engine and measure the RPM at idle.
8. If the measured speed deviates from the norm, loosen the lock nut on the adjusting screw (indicated by an arrow) and, turning the screw, set the required number of revolutions, then fix the screw with a lock nut.
9. Install the air filter.
CVH motors with manual choke control
10. Pull out the choke control cable and set the choke to the open position.
11. Start the engine and measure the RPM at idle.
12. If the measured number of revolutions deviates from the norm, adjust the number of revolutions by turning the adjusting screw located under the cable.
13. Since October 1987, carburetors have been equipped with a spring-loaded choke actuator, which can also be installed on cars of earlier releases.
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