1. There is something wrong with the ignition system, such as the aging of the ignition coil and the failure to replace the spark plug for a long time, resulting in insufficient ignition energy, poor combustion, weak engine acceleration and engine fault light.

Second, the fuel system failure system failure leads to low pressure. Insufficient fuel injection will lead to weak engine acceleration.

Third, too much carbon deposit in the engine leads to poor fuel atomization, poor combustion of fire and gas, too much exhaust gas and weak engine acceleration.

4. The failure of the engine system causes the engine to enter an emergency operation state, thus limiting the power output of the engine and causing the engine to fail to accelerate. For example, the fault of engine sensors, such as oxygen sensor, air flow, crankshaft position sensor, knock sensor, etc. , will cause the engine to enter an emergency operation state, resulting in the engine can not accelerate.

After we found the problem, we went to the maintenance organization to diagnose the relevant fault codes with a computer, and carried out troubleshooting according to the fault codes and related test results.