What Causes Car Throttle to Tremble?

[ZoeDella]

Reasons for car throttle trembling: 1. It could be due to engine misfiring or broken high-voltage wires, leading to acceleration shaking. 2. If the throttle is released at this time, the shaking may reduce or disappear. The vehicle speed during the fault occurrence varies with the degree of damage to the faulty component. 3. First, check whether the left and right half-shafts are bent. Then, disassemble and inspect the inner walls of the left and right inner CV joints for wear and pits. In most cases, the issue arises from pits on the inner walls of the CV joints at the contact points with the outer races of the needle bearings—the torque transmission points (stress points). 4. During rapid acceleration, because there is a certain angle between the axial direction of the half-shaft and the inner CV joint, these stress points continuously shift back and forth along the axial direction as the CV joint rotates. The force generated by this movement pushes the car body alternately to the left and right, resulting in the shaking phenomenon.