What Causes Car Shaking When Accelerating Hard?

[DeGia]

Car shaking when accelerating hard is caused by: it belongs to acceleration shudder, generally due to poor combustion, which may be caused by low fuel pressure, poor ignition leading to incomplete combustion, or insufficient cylinder pressure resulting in power loss. The solutions are to clean the throttle body; check the spark plugs and replace them if necessary; perform wheel alignment and balancing. There are many other possibilities, sometimes improper use of engine oil can also cause vibration, such as needing an oil change, excessive carbon buildup from mostly low-speed driving, etc. The accelerator, also known as the "throttle" or "air valve", refers to the control device that regulates engine power (thrust). In piston aircraft engines, the throttle controls the carburetor's throttle opening to regulate cylinder filling, thereby determining the engine's output power.