What are the symptoms of a faulty car charcoal canister purge valve?

1 Answers
Kelsey
07/30/25 1:00am
Symptoms of a faulty car charcoal canister purge valve: 1. Abnormal noises while driving - when the engine is running at non-idle speeds, you may occasionally hear a clicking sound; 2. Jerky acceleration when pressing the gas pedal with noticeable fuel odor inside the car; 3. After starting the engine, the idle speed fluctuates rhythmically between high and low with poor acceleration performance; 4. Engine stalling or difficulty starting; 5. Possible occurrence of so-called "flooded cylinder" condition, resulting in hard starting or weak ignition. The car charcoal canister is designed to absorb fuel vapors from the gas tank. Normally closed, the purge valve opens after engine start to send these vapors into the engine for combustion, which is both environmentally friendly and energy-efficient.
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