Why are Changan Alsvin drivers in Pakistan experiencing rough idling o r stalling due to purge valve malfunction?

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Why are Changan Alsvin drivers in Pakistan experiencing rough idling o r stalling due to purge valve malfunction?

Several users report unstable engine idle o r unexpected stalling, especially in traffic. Could this be caused by a faulty o r stuck purge control valve?

Sandeep asked on 18 Jun 2025 12:05:36 pm

1 Answer

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Car Mechanic Expert - on 18 Jun 2025 12:08:57 pm

Yes, a faulty purge control valve can cause:

Rough idling

Engine stalling, especially during stop-and-go traffic

This happens because the purge valve, which is part of the EVAP system Evaporative Emission Control System, can stick open o r closed, disrupting the air-fuel mixture. In Pakistan’s urban conditions with heavy traffic and idling, this problem becomes more apparent.