How can a faulty spark plug affect the fuel efficiency and power of the Changan Karvaan?

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How can a faulty spark plug affect the fuel efficiency and power of the Changan Karvaan?

When spark plugs don’t ignite fuel properly, the engine may struggle with poor acceleration and higher fuel consumption. Have Karvaan owners experienced these symptoms after 20,000–30,000 km?

Qalb E Momin asked on 06 Aug 2025 13:00:54 pm

1 Answer

19 views |

Car Mechanic Expert - on 06 Aug 2025 13:04:33 pm

A bad o r worn-out spark plug causes:

Incomplete fuel combustion

Reduced engine power especially uphill o r with AC on

Higher fuel consumption

Many Karvaan users notice:

Poor acceleration

in mileage by 2–3 km/liter
These symptoms commonly appear after 20,000–30,000 km, especially in city driving.