Can a faulty purge control valve cause poor fuel economy in my Suzuki Alto?

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Can a faulty purge control valve cause poor fuel economy in my Suzuki Alto?

I’ve been noticing that my Suzuki Alto’s fuel economy has decreased significantly over the past few weeks. After some research, I think it could be related to the purge control valve not functioning properly. How does a malfunctioning purge control valve affect fuel economy, and what steps can I take to fix the issue in my Alto?

Gari Specialist asked on 20 Feb 2025 12:10:42 pm

1 Answer

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Gari Master - on 20 Feb 2025 12:13:25 pm

Yes, a faulty purge control valve can directly contribute to poor fuel economy in your Suzuki Alto. Heres how:

Excessive Fuel Vapors: If the purge control valve is stuck open, excess fuel vapors may be constantly released into the engine, causing an incorrect air-fuel mixture. This results in inefficient fuel combustion, reducing fuel economy.
Improper Engine Performance: If the purge valve is stuck closed, it can cause fuel vapors to build up in the system, affecting engine performance. This can lead to incomplete combustion, decreased power, and the engine consuming more fuel to operate properly.
To fix the issue:

Replace the purge control valve if its malfunctioning.
Ensure the rest of the EVAP system is functioning correctly to prevent fuel vapor issues from recurring.
Consider cleaning the fuel system to remove any carbon buildup that might have occurred due to improper fuel vapor management.