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Adjusting the engine idling

Adjusting screw amount of the mixture, set the engine speed to idle in the range of 900 ?� 50 / min (when turning the screw clockwise the speed decreases).

At idle, carbon monoxide (CO) in the exhaust gases must be 0,5 ?� 0,2%. If it is less, it may be due to the following reasons:

• leakage of the intake tract of the engine (after meter of air flow);
• the fault of additional air supply valve;
• fault fuel pressure regulator;
• Partial blockage of the fuel filter;
• mismatch discharge pressure of the fuel pump to the nominal value;
• Malfunction of;
• malfunctions of electronic devices fuel injection system (to check them, use the control device Bosch 0.684.100.202).

The causes of increased CO content can be:

• insufficient tightness dipstick;
• elevated levels of oil in the oil pan;
• leakage of intake or exhaust valves;
• air flow meter fault;
• powershift launcher nozzles;
• malfunctions of electronic devices fuel injection system (to check them, use the control device Bosch 0.684.100.202);
• leaking injectors.