What is the reason for the high fuel consumption of 2003 antelope?

Reason for failure: 1. Engine technical condition 1 causes of fuel consumption. Improper adjustment of main metering hole of carburetor. 2. The ignition system parts are faulty or improperly adjusted. 3. Improper adjustment of oil pump and injector in diesel fuel injection system. 4, piston, piston ring and cylinder wall wear is too large. 5. The valve mechanism is not tightly sealed or the valve clearance is too large. 6. The engine temperature is too high or too low. Second, the technical condition of automobile chassis leads to excessive fuel consumption. 1, the clutch is slipping. 2. The fit clearance between the shaft, bearing and gear of the transmission is too small. 3. Improper toe-in adjustment. 4. Brake drum delay. 5, tire pressure does not meet the requirements, air pressure is low. The solution for high fuel consumption of automobiles: 1. The fuel consumption rate in use is higher than the original factory regulation or quota value. The main distribution needle can be adjusted or the appropriate main metering hole can be replaced. When adjusting in operation, the optimization method can be used to adjust to the economic value 14.7: 12, and the parts are damaged, invalid or improperly adjusted (such as too late ignition, improper spark plug gap, improper contact gap of circuit breaker, etc.). ). Select the ignition timing correctly, calibrate the gap between the spark plug and the disconnector, and eliminate and check the technical conditions and faults of the ignition system parts. 3. Excessive oil supply, uneven oil supply in each cylinder or poor atomization, etc. , should be adjusted in time. If it is found that the exhaust pipe emits black smoke and cannot work, and the water temperature is too high, it is necessary to correctly choose the oil supply and injection advance angle. 4. If the clearance between piston, piston ring and cylinder wall is too large or the gasket of valve cylinder leaks, the piston ring should be replaced or the cylinder liner overhauled, and the cylinder should be re-bored (standard pressure value: 90% under repair; Second guarantee 85%; Minimum not less than 75% of the original design. After overhaul, 95% of Dongfeng cars and 90% of other cars). 5. The intake valve and exhaust valve are in poor contact with the valve seat, or the valve clearance is improperly adjusted. It can be determined by sound level and measuring cylinder pressure. Grind the valve and adjust the valve clearance. 6. If the temperature is high, remove the scale of radiator and engine water jacket, adjust the tightness of fan belt, repair water pump, check and adjust the angle of fan blade; If the temperature is low, check whether the shutters are closed, check the working condition of the thermostat and check the insulating sleeve installed for heating. 7. The brake drum is hot, the brake is delayed, and the temperature resistance is increased. It is necessary to adjust the gap between the brake drum and the brake shoe.