Why does the Focus shake during acceleration but not when releasing the throttle?

[VonEmiliano]

The Focus shakes during acceleration but not when releasing the throttle. It is recommended to check whether the vehicle's tires require dynamic balance calibration, and also to inspect if the throttle body is excessively dirty. These factors may contribute to the issue of the Focus shaking during acceleration but not when releasing the throttle. Below is relevant information: 1. The new-generation Focus 2020 model is equipped with two engines: the 1.5L Eco-Boost and the 1.5L Ti-VCT, with all models meeting the China VI emission standards. 2. The 1.5L Eco-Boost turbocharged dual-injection engine integrates over 20 cutting-edge technologies, including the PFDI dual-injection technology system and a low-inertia mixed-flow turbocharger, delivering a rated power of 174 horsepower and a maximum torque of 243N·m/1750-4500rpm, paired with an 8-speed automatic transmission for both powerful performance and fuel efficiency. 3. The 1.5L Ti-VCT dual-independent variable camshaft timing engine is matched with a 6-speed manual/automatic transmission, achieving a combined fuel consumption as low as 5.4L per 100 kilometers.