What are the effects of worn-out spark plugs on the fuel consumption of a Honda City?

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What are the effects of worn-out spark plugs on the fuel consumption of a Honda City?

Does delayed ignition due to old spark plugs cause higher fuel consumption and poor mileage on city and highway routes?

Sandeep asked on 27 Feb 2025 12:50:23 pm

1 Answer

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Car Mechanic Expert - on 27 Feb 2025 14:10:14 pm

Delayed ignition: As spark plugs wear out, they may fail to ignite the fuel-air mixture at the correct time, causing delayed ignition. This results in higher fuel consumption.
Poor mileage: Inconsistent combustion due to worn-out plugs leads to reduced engine efficiency, resulting in poor fuel economy both in city driving and on highways.