Is poor fuel economy in Changan Karvaan sometimes caused by engine-related problems like dirty throttle body, clogged injectors, o r timing issues?

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Is poor fuel economy in Changan Karvaan sometimes caused by engine-related problems like dirty throttle body, clogged injectors, o r timing issues?

Some users report mileage under 10 km/l in city driving. Is lack of preventive maintenance affecting fuel efficiency?

Sandeep asked on 26 Jun 2025 11:53:32 am

1 Answer

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Car Mechanic Expert - on 26 Jun 2025 11:57:50 am

Yes. Causes of poor mileage include:

Clogged throttle body

Carbon buildup in injectors

Poor ignition timing

Overdue spark plugs and air filters

Many users report less than 9 km/l in city driving, especially when:

AC is running

Load is high

Maintenance is skipped

➡️ Preventive engine maintenance is often ignored, leading to poor fuel economy.