Execution order
1. Remove the carburetor.
2. Secure the carburetor in a vice with the jaws covered with soft material, leaving access to the mixture adjustment screw (MAS).
3. Drill a 2mm diameter hole in the center hole for the fuel mixture adjustment screw (MAS), then ream the hole with a 3mm diameter drill bit.
4. Insert a punch into the drilled hole and knock out the plug.
5. Install the carburetor on the engine.
6. Start the engine and warm it up to a coolant temperature of 80–95°C.
Adjustment conditions
The headlights, electric radiator fan and all electrical consumers must be switched off and the transmission must be in neutral.
7. Drive the car for 5 minutes at 48 km/h or increase the crankshaft speed to 2000–3000 min⁻¹ for no more than 5 seconds.
8. Then let the engine idle for 2 minutes.
9. Adjust the CO content and idle speed by turning the idle speed adjustment screw (SAS-1) and the fuel mixture adjustment screw (MAS).
- CO content at idle speed: 2.0±0.25%
- Idle speed of 1.3L engine with manual transmission: 850±100 min⁻¹
10. Install the plug to close access to the fuel mixture quality adjustment screw.