Why does it feel a little hard for my 2.4 Shengda automatic to run to 140?

First, use the automobile diagnostic computer to detect whether there is a fault code, and then repair it after troubleshooting.

Second, check whether the spark plug of the vehicle is ablated. Weak ignition energy may also lead to vehicle weakness.

Third, check the air intake filter of the vehicle. If it is dirty, the air intake is poor and the engine air is stuffy.

Fourth, check the dirty degree of the throttle. Too dirty will lead to inaccurate throttle position signal and weak acceleration, such as cleaning the throttle as follows:

1. Remove the throttle hose. 2. Open the throttle. 3. Clean with a brush. 4. Spray with detergent. 5. Replace the hose and it's done.