The fuel consumption of the car is too high, and the engine fault light is on. After cleaning the throttle, replacing the carbon canister electronic valve, replacing the air filter and replacing the s

The fuel consumption of the car is too high, and the engine fault light is on. After cleaning the throttle, replacing the carbon canister electronic valve, replacing the air filter and replacing the spark plug, the fuel consumption is still high. 1. Now all engines have computer automatic diagnosis system. It is very convenient to check and repair them in 4S stores. 2. The fault that still exists after the fault code saved by the computer is eliminated is the fault of parts without sensors, such as the mechanical part of the engine and the computer itself. 3. The engine mechanical failure is generally low cylinder pressure and low fuel utilization rate; Oil dripping from the nozzle; Wait a minute. Just measure the cylinder pressure. 4. There are problems with the computer itself, such as poor contact with the socket, excessive correction of the computer, and inattention. It can be judged by changing an ECU.