Why Does the Car Shake Violently When the Accelerator Is Pressed Hard?
3 Answers
Fuel system issues, electrical system issues, mechanical reasons. Below are the reasons for vehicle shaking when the accelerator is pressed hard: 1. Fuel system issues: Generally caused by fuel line blockages, leading to poor fuel supply, manifested as engine shaking, unstable idling, and stalling while driving. Additionally, fuel pump failure can also cause engine shaking. 2. Electrical system issues: Check if the ignition timing is correct; abnormal ignition is usually a timing issue. Inspect whether the spark plugs have aged, if the gaps are uniform, and if the gaps have changed. Also, a malfunctioning distributor can cause engine shaking. 3. Mechanical reasons: Check the engine's operating condition for any abnormal sounds, such as valve noise. Inspect the belt's working condition to see if it is loose.
I've been driving for over a decade, and when you stomp on the gas pedal and the car shakes like that, it's most likely an issue with the ignition system. For example, the spark plugs might be too old and worn out, failing to ignite the gasoline properly, which leads to uneven combustion and causes the whole car to shake. It could also be clogged fuel injectors preventing fuel from spraying properly, making the engine starve for fuel and resulting in shaking. When you floor the accelerator and increase fuel demand, these problems immediately become apparent. I recommend taking it to a repair shop for inspection right away—don't delay, or engine damage could lead to costly major repairs. Regular maintenance, like replacing spark plugs and cleaning the fuel injection system, can prevent this. Poor tire balance might also worsen the shaking, but ignition issues are the most common. Remember, safety comes first—if the shaking gets too severe while driving, don't push through; slow down and pull over.
As a car enthusiast, I enjoy tinkering with my car and have found that sudden acceleration jerks are usually related to engine combustion. A dirty fuel system, such as clogged injectors or a faulty mass airflow sensor, can affect the air-fuel mixture ratio, leading to unstable combustion and jerking. It could also be due to a bad ignition coil or spark plugs failing to fire. While not a major issue, it can be dangerous if the engine stalls at high speeds. I use an OBD scanner to read trouble codes for accurate diagnosis. Regular cleaning of the throttle body and fuel injectors is key to maintaining good combustion. Modifying cars often leads to such issues, so learning some basic knowledge can save money and hassle. Once resolved, the car accelerates more smoothly.
