- Remove the carburetor and place it in a vise with the fuel mixture adjustment screw facing up.
- Drill a hole (A) 2 mm diameter in the housing near the fuel mixture quality adjustment screw at an angle of 45°to the seal, then drill a hole to a diameter of 3 mm.
- Insert a pin into the hole (D) and remove the filling (IN) from the channel (WITH). Install the carburetor to the engine.
If the safety seal is missing, do the following:
- By pressing the gas pedal once, reset the increased idle speed.
- Disconnect the ground wire from the battery and the vacuum hose from the second air valve by plugging its end (A).
- Start the engine and let it idle for at least 5 minutes. Set the idle speed.
- Connect the positive lead of the voltmeter to the negative lead of the feedback solenoid valve (see fig. MCC06 009). Connect the negative lead of the voltmeter to ground. In this case, the feedback solenoid valve must be connected.
- Record the voltmeter reading at idle. Connect the oxygen sensor connector.
- Let the engine run for 10 seconds at 2000-3000 rpm.
Check the voltmeter reading: if the center of oscillation of the arrow corresponds to the previously recorded value (±0,5%) - proceed to the next operation. If the center of movement of the arrow does not coincide with the previously recorded value, turn the screw for adjusting the quality of the fuel mixture until the center of the oscillation of the arrow coincides with the specified value at idling speed. After adjustment, repeat the previous two steps.
If necessary, adjust the idle speed with the screw (A) (see fig. МЦК06.006).
With the engine running at idle, open the throttle to increase the rpm to 3000 rpm. Close throttle. Verify that the voltmeter needle deviates from its idle position when the engine speed is increased and returns to its original position when the idle speed is restored.
After connecting the hose to the second air valve, install a new seal.