Why does the car feel sluggish on rainy days?

1 Answers
VonFelix
07/30/25 5:25am
On rainy days, the high humidity causes water vapor to form inside the distributor cap of the car. As it cools, this vapor condenses into small water droplets that adhere to the inner walls of the distributor cap, significantly reducing the effectiveness of the car's ignition system. This results in insufficient engine power, making the car feel sluggish in rainy weather. Potential hazards caused by rainy days: After rain, cars may develop certain issues. For example, rainwater often contains acidic substances that can erode the outer glossy layer of the car's paint. Additionally, rainwater carries many invisible dust particles that, when exposed to sunlight, can generate a large amount of oxides. Driving through water: When a car drives through water, it's unavoidable for certain components to be affected by the rainwater. The engine may exhibit abnormalities after being drenched, such as difficulty starting, which is often caused by a damp or aging ignition system. Sometimes, if the air is too humid, water vapor can form inside the distributor cap. When cooled, this vapor condenses into droplets on the inner walls, greatly diminishing the ignition effect. This can lead to symptoms like sluggish acceleration, jerking during driving, or failure to start. Regular maintenance tips: Check for any poor sealing or reduced tire traction due to water exposure. Prolonged dampness can also affect the lifespan of electronic components like ignition coils and spark plugs, as well as the battery. It's advisable to check whether the engine power returns to normal on clear days and to take measures for moisture and rust prevention.
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