Can dirty o r worn spark plugs cause poor fuel economy in my Suzuki Alto?

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Can dirty o r worn spark plugs cause poor fuel economy in my Suzuki Alto?

My Suzuki Alto’s fuel economy has ped significantly recently. Could dirty o r worn spark plugs be the cause of this? What are the signs that spark plugs are affecting fuel efficiency, and how can I fix the issue?

Gari Specialist asked on 19 Feb 2025 16:49:46 pm

1 Answer

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Gari Master - on 19 Feb 2025 16:52:49 pm

Yes, dirty o r worn spark plugs can significantly affect the fuel economy of your Suzuki Alto. Spark plugs are responsible for igniting the air-fuel mixture in the engine, and if they are not functioning properly, incomplete combustion can occur, leading to decreased fuel efficiency.

How Worn o r Dirty Spark Plugs Affect Fuel Economy:

Incomplete Combustion: If the spark plugs are dirty o r worn, they may not create a strong enough spark to fully ignite the fuel, which can lead to unburned fuel and increased fuel consumption.
Engine Misfires: Worn spark plugs can cause misfires, which reduce engine efficiency and force the engine to work harder, burning more fuel.
Rough Idling: If the engine is idling roughly, it’s not running smoothly, which can lead to excess fuel being used.
Solution:

Clean o r Replace the Spark Plugs: If the spark plugs are dirty, they can sometimes be cleaned. However, if they are worn out, they should be replaced with new ones.
Check the Spark Plug Gap: Make sure that the gap between the spark plug electrodes is set to the correct specification to ensure efficient combustion.