What Causes Vibration When Pressing the Accelerator?
2 Answers
Reasons for vibration sensation when pressing the accelerator: 1. The vehicle's half-shaft, under long-term torsional fatigue and impact forces, is prone to bending, twisting, breaking, or wear and misalignment of spline teeth. This can cause rhythmic shaking of the car's front end when accelerating within a certain speed range, with the shaking disappearing or reducing after releasing the accelerator. 2. It could also be due to issues with the engine's operation. The engine requires sufficient air, adequate fuel, and a well-functioning ignition system to operate properly. Problems in any of these areas can lead to engine vibration. 3. If there is leakage or blockage in the intake system, the car may experience shaking during acceleration when the accelerator is pressed. 4. Worn-out spark plugs or the use of inferior quality spark plugs can result in weak acceleration and shaking during acceleration. 5. Excessive carbon buildup in the throttle body, malfunctioning fuel injectors, faulty fuel pumps, clogged fuel filters, etc., can all cause the car's engine to shake during acceleration.
When stepping on the accelerator, I feel the car shaking, a situation I often hear friends mention. The most common issue is the aging of the rubber block in the engine mount. This rubber cushion is originally designed to absorb vibrations, but when it ages, the engine's power transmits vibrations directly into the car. Another common problem is excessive carbon buildup in the engine blocking the valves, especially in older cars that haven't been cleaned for years—stepping on the accelerator makes it seem like the car is gasping for air and shaking. Additionally, aging spark plugs or faulty ignition coils are also culprits, as they affect ignition efficiency leading to incomplete combustion. Of course, unbalanced tire alignment can also cause resonance during acceleration, with vibrations typically becoming more noticeable as speed increases. It's recommended to first check the most vulnerable parts like the engine mount and spark plugs, and if necessary, clean the fuel system to address carbon buildup issues.
