Defective or misadjusted air/fuel ratio adjuster
- Check the air-fuel ratio corrector and control unit
Idle stabilization valve defect
- Check valve
Fuel start valve defective
- Check valve
Fuel start valve leaking due to gasket defect
- Check the tightness of the valve
Air flow meter damper set incorrectly
- Check the position of the gate valve
Difficult to move gate valve or control piston
- Check stroke of gate valve and control piston
The engine sucks in foreign air
- Inspect all hoses and their connections
A warm engine does not start at all or starts poorly
Defective or misadjusted air/fuel ratio adjuster
- Check the air-fuel ratio corrector and control unit
Air flow meter damper set incorrectly
- Check the position of the gate valve
Difficult to move gate valve or control piston
- Check stroke of gate valve and control piston
Leaky injectors and low injector opening pressure
- Check the injectors in the workshop
Low fuel pressure in the system
- Measure the pressure in the workshop
Too rich mixture at idle speed
- Adjust CO content
Too lean mixture at idle
- Adjust CO content
Cold engine vibrates at idle
Defective or misadjusted air/fuel ratio adjuster
- Check the air-fuel ratio corrector and control unit
Idle stabilization valve defect
- Check valve
Fuel start valve leaking due to gasket defect
- Check the tightness of the valve
Air flow meter damper set incorrectly
- Check the position of the gate valve
The engine sucks in foreign air
- Inspect all hoses and their connections
Air flow meter damper set incorrectly
- Check the position of the gate valve
Cold engine runs rough during acceleration
Fuel start valve defective
- Check valve
Throttle switch defective
- Check switch
Warm engine vibrates at idle
Defective or misadjusted air/fuel ratio adjuster
- Check the air-fuel ratio corrector and control unit
Idle stabilization valve defect
- Check valve
Difficult to move gate valve or control piston
- Check stroke of gate valve and control piston
The engine sucks in foreign air
- Inspect all hoses and their connections
Leaky injectors and low injector opening pressure
- Check the injectors in the workshop
Low fuel pressure in the system
- Measure the pressure in the workshop
Backfires in the intake manifold
Defective or misadjusted air/fuel ratio adjuster
- Check the air-fuel ratio corrector and control unit
Low fuel pressure in the system
- Measure the pressure in the workshop
Backfires in the exhaust system
Defective or misadjusted air/fuel ratio adjuster
- Check the air-fuel ratio corrector and control unit
Fuel start valve leaking due to gasket defect
- Check the tightness of the valve
Leaky injectors and low injector opening pressure
- Check the injectors in the workshop
Fuel pump failure
- Check fuel pump
Engine runs intermittently, stalls
Uneven fuel supply by the pump
- Measure pump fuel delivery
Incorrect pressure in the fuel system
- Measure and adjust the pressure in the fuel system
Low effective engine power
Defective or misadjusted air/fuel ratio adjuster
- Check the air-fuel ratio corrector and control unit
Fuel start valve leaking due to gasket defect
- Check the tightness of the valve
Difficult to move gate valve or control piston
- Check stroke of gate valve and control piston
The engine sucks in foreign air
- Inspect all hoses and their connections
Leaky injectors and low injector opening pressure
- Check the injectors in the workshop
Low fuel pressure in the system
- Measure the pressure in the workshop
Weak fuel pump
- Measure pump fuel delivery
Throttle does not move to position «Full throttle»
- Adjust cable «gas»
The engine continues to run after the ignition is turned off
Fuel start valve leaking due to gasket defect
- Check the tightness of the valve
Air flow meter damper set incorrectly
- Check the position of the gate valve
Difficult to move gate valve or control piston
- Check stroke of gate valve and control piston
Air flow meter damper set incorrectly
- Check the position of the gate valve
Increased fuel consumption
Defective or misadjusted air/fuel ratio adjuster
- Check the air-fuel ratio corrector and control unit
Fuel start valve leaking due to gasket defect
- Check the tightness of the valve
Leaky injectors and low injector opening pressure
- Check the injectors in the workshop
A warm engine has an increased idle speed
Idle stabilization valve defect
- Check valve
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