What are the reasons for the failure of a car purge pump?
2 Answers
About the reasons for the failure of the purge pump, it is due to a malfunction in the internal motor, which requires professional repair. Additionally, a missing phase in the three-phase power supply can also cause burnout. Reduced vehicle power: Damage to the purge pump prevents fuel vapor from the charcoal canister from entering the cylinder, leading to a decrease in the concentration of the combustible air-fuel mixture in the engine. This results in reduced power output from the vehicle. Increased fuel consumption: If the charcoal canister is saturated with fuel vapor but the purge pump fails to expel the vapor from the canister, subsequent fuel vapor cannot be recovered. This naturally leads to an increase in the vehicle's fuel consumption.
My old car's purge pump has failed twice, mainly due to aging internal components from prolonged use. The motor and blades inside the pump are severely worn, and excessive dust and debris buildup has clogged the air ducts. On the electrical side, the wiring connected to the pump may have short circuits or unstable voltage, causing overheating and burnout. I often drive on dusty roads and haven't cleaned the AC system regularly, which over time puts extra strain on the pump and accelerates its failure. It's recommended to check the AC filter more often to prevent it from getting too dirty and to maintain proper ventilation, which can extend its lifespan. When parking, try to avoid direct sunlight or damp environments, as these can corrode the pump's metal parts. DIY cleaning is fine, but avoid disassembling it randomly to prevent further damage.
