Why did Wuling 1.5 Liu Guo engine power drop so much?

1. Carbon deposit: including cylinder carbon deposit, throttle carbon deposit, spark plug carbon deposit, intake carbon deposit, etc. When there is too much carbon in the engine, it will reduce the ignition energy of the car and the intake efficiency, which will eventually lead to the reduction of engine power and the inability to idle. 2. Fuel system: adding inappropriate fuel labels will reduce the output power and power of the vehicle; Or because the vent hole of the fuel tank cover is blocked, the fuel tank switch, fuel filter and the oil pipe between the fuel tank and carburetor are partially blocked, which can not meet the required oil supply, resulting in too thin mixture and weak engine acceleration. 3. Air intake system: if it is not cleaned in time after long-term use, the air filter will be blocked and the air volume will be insufficient, which will cause the combustible mixture to be too rich and reduce the engine power; If it is a vehicle with a turbocharger, once the turbocharger fails, it will also lead to the reduction or weakening of engine power. 4. Engine overheating: insufficient engine oil, insufficient engine coolant and failure of engine cooling device will increase the load of the engine and lead to poor engine cooling. Overheating of engine will cause poor lubrication effect, increase mechanical wear, reduce engine power and increase fuel consumption.