Why can't Chang 'an Star 2 engine accelerate?

Your situation is mainly caused by poor engine combustion.

The main reasons here are as follows.

First, the fuel pressure is too low, resulting in insufficient oil supply and insufficient power. I suggest you clean the injector and check the oil pressure at the same time.

Second, poor ignition leads to poor combustion and obvious waste oil. I suggest you replace the spark plug.

Third, the cylinder pressure is insufficient, which is a common manifestation of cylinder trembling and also a lack of power. This needs testing.

Fourth, the engine has poor air intake and exhaust, which generally leads to problems in the air filter position and the exhaust three-way catalyst position.

I suggest you go to the repair shop for a comprehensive inspection as soon as possible.

I hope I can help you. Have a nice trip! If there is something wrong with your car, ask the car mechanic. 4S shop professional technician, 10 minutes to solve.