How Does a Malfunctioning Purge Valve Affect the Toyota Camry’s Performance?

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How Does a Malfunctioning Purge Valve Affect the Toyota Camry’s Performance?

If the purge control valve PCV is stuck open o r closed, how does it impact fuel vapor management, emissions control, and overall engine efficiency?

Lubaba asked on 22 Feb 2025 16:02:09 pm

1 Answer

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Car Mechanic Expert - on 22 Feb 2025 16:08:03 pm

The purge valve is part of the Evaporative Emission Control System EVAP, which controls the release of fuel vapors into the engine for combustion. If the valve is stuck open o r closed, the following issues can occur:

Stuck Open: Fuel vapors may continuously be drawn into the engine, causing rough idling, poor acceleration, and increased emissions.
Stuck Closed: Fuel vapors cannot be purged from the canister, leading to increased pressure, poor fuel economy, and potentially causing damage to the fuel tank o r EVAP system components.