What Causes Car Throttle to Tremble?
2 Answers
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.
I think the most common cause of throttle vibration in cars is an issue with the ignition system, such as aging spark plugs or faulty ignition coils, which can lead to uneven engine operation. This vibration is transmitted to the throttle pedal, making you feel the tremor. Another factor could be excessive carbon buildup in the throttle body or sensor failure, affecting the throttle response sensitivity. If you noticeably feel shaking when pressing the accelerator, it's best to first check the condition of the spark plugs. You can use simple tools to inspect them yourself or visit a repair shop for a professional diagnosis as soon as possible. Ignoring the issue for a long time may worsen engine wear or compromise driving safety, especially at high speeds. Addressing it early can prevent major repairs. Regular engine maintenance can effectively prevent such problems.
