What are the effects of a faulty purge pump?

1 Answers
LucyLynn
07/29/25 7:10pm
It can lead to the emission of fuel vapor directly into the atmosphere, causing air pollution. During normal engine operation, instead of fuel vapor, pure air may be drawn in, resulting in an overly lean air-fuel mixture. If the pump fails in a stuck position, such as being constantly open, it can cause excessively high engine fuel consumption. A faulty purge pump may exhibit the following symptoms: 1. Difficulty starting: The engine is hard to start and very prone to stalling. Frequent secondary starts are needed, and the engine is very likely to stall again after starting. 2. Abnormal noises: There may be noises while driving the car. Specifically, a "clicking" sound can sometimes be heard when the engine is not idling. 3. Increased fuel consumption: Fuel consumption rises, and there is a strong smell of gasoline inside the car. 4. Poor acceleration: After the engine starts, the idle speed fluctuates regularly, and the vehicle lacks power during acceleration.
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