What causes severe car shaking when the accelerator is pressed hard?

[McGabriel]

Severe car shaking when the accelerator is pressed hard can be caused by the following reasons: 1. Dirty air filter: The air filter is designed to protect the engine and reduce wear, typically requiring replacement around 10,000 kilometers. If not replaced in time, insufficient air intake can lead to low idle speed, causing the engine to shake. Simply replacing the filter can resolve this issue. 2. High-voltage line break: A high-voltage line break refers to a broken conductor core in the high-voltage line, which can affect ignition and cause engine shaking. Use a multimeter to measure resistance and replace the one with significantly higher resistance. 3. Spark plug lifespan: Spark plugs have a limited lifespan. After exceeding 30,000 to 40,000 kilometers, their ignition efficiency noticeably decreases, which can affect ignition. This is the most common issue, and replacing all spark plugs can solve the problem.