(1) The fuel consumption rate of the car is higher than the original specification or the rated value, and the main dispensing needle can be adjusted or the appropriate main measuring hole can be replaced. When adjusting during operation, the optimal method can be used to adjust to the economic value of 14.7:1,
(2) If the parts are damaged, fail or improperly adjusted, the ignition timing should be correctly selected, the spark plug breaker gap should be calibrated, and the removal and inspection should be performed. Technical condition and failure of ignition system parts.
(3) The oil supply is too large, the oil supply of each cylinder is uneven or the atomization is poor, etc., it should be adjusted in time. If it is found that the exhaust pipe emits black smoke, the work is weak, and the water temperature is too high, it is necessary to correctly select the fuel supply and fuel injection advance angle.
(4) If the clearance between the piston, the piston ring and the cylinder wall is too large or the valve cylinder gasket leaks, the piston ring should be replaced or the cylinder liner should be overhauled, and the cylinder should be re-bored.
(5) Poor contact between intake and exhaust valves and valve seat, or improper adjustment of valve clearance. It can be determined by the size of the sound and measuring the cylinder pressure. Grind the valve and adjust the valve clearance.
(6) If the temperature is high, remove the scale in the radiator and engine water jacket, adjust the tightness of the fan belt, overhaul the water pump, and check and adjust the angle of the fan blades; if the temperature is low, check that the shutters are closed Whether it is tight, check the working condition of the thermostat and check the thermal insulation jacket installed on the heating.
(7) The braking force is hot, the brake drags, and the resistance increases when the temperature rises. Adjust the gap between the braking force and the brake shoe.