Idle speed adjustment must be carried out on a warm engine (oil temperature 60°C) with adjusted gaps in the gas distribution mechanism and with a correctly set ignition timing.
Remove the air filter.
Install air filter simulator 13 0 000 by connecting its hose to the air filter and cylinder head.
Adjusting screw 1 mixture quantity (see photo) set the proper idle speed of the engine.
Unscrew the screw plugs from the exhaust manifolds and screw in sensors 13 0 020 instead.
Attach the gas analyzer and adjusting screws 2 (for rear exhaust manifold) and 3 (for front exhaust manifold) quality (composition) mix to achieve the desired content of carbon monoxide (SO) and exhaust gases.
After completing the adjustment, install new blue plastic plugs in the hole for adjusting mixture quality screws 2 and 3.