What Causes Poor Acceleration in Small Cars?

[McRobert]

The reasons for poor acceleration in small cars are as follows: 1. Dirty air filter: The air filter is designed to protect the engine and reduce wear. It is generally replaced every 10,000 kilometers. If not replaced in time, insufficient air intake can cause low idle speed, leading to engine shaking. Simply replacing the filter element can solve the problem. 2. High-voltage line break: A high-voltage line break refers to the breakage of the wire core in the high-voltage line, which can affect ignition and cause engine shaking. Use a multimeter to measure the resistance and replace the one with significantly higher resistance. 3. Spark plug lifespan: Spark plugs have a limited lifespan. After 30,000 to 40,000 kilometers, their ignition efficiency noticeably decreases, which can affect ignition. This is the most common issue, and replacing all the spark plugs can resolve it.