Adjust ignition timing.
Check the air supply system.
Warm up the engine to +60°С. Do not adjust the idle speed when the engine is hot, after heavy driving.
Disconnect the fuel drive linkages.
Check throttles for ease of opening.
Turn on all consumers of the on-board network and check the operation of the engine.
After following these recommendations, you can adjust the idle speed in the following sequence:
Install the fuel supply rods, making sure that the rocker lever roller rests without force on the stop and, in vehicles with an automatic transmission, the control rod is fully extended, adjust if necessary.
idle screw (see arrow in fig. 149) adjust the speed within 750... 850 rpm.
Pic. 149. Idling adjustment. The arrow points to the adjusting screw.
Check the CO content in the exhaust gases and, if necessary, the screw on the control device (see arrow in fig. 150) adjust within 3.5% CO. When the screw is turned to the left, the mixture is leaner, to the right, it is enriched. Access to the control device is possible after removing the body upholstery.
Pic. 150. Adjustment of CO content on the control device.
Check the idle speed again and adjust if necessary.
Check the stops under full load with the engine off, as for carbureted engines (see fig. 128).