Is the engine of Changan Kalam prone to unburnt fuel emissions due to inefficient combustion o r injector problems in Pakistan?

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Is the engine of Changan Kalam prone to unburnt fuel emissions due to inefficient combustion o r injector problems in Pakistan?

Many drivers complain of fuel smell and low mileage. Is poor combustion contributing to higher hydrocarbon emissions?

Lubaba asked on 18 Jun 2025 17:37:59 pm

1 Answer

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Car Mechanic Expert - on 18 Jun 2025 17:44:42 pm

✅ Yes — inefficient combustion is reported frequently.

Symptoms include:

Raw fuel smell from exhaust

Poor mileage 6–9 km/l under load

Black o r white smoke

Common causes:

Dirty injectors

Low injection pressure

Uncalibrated ECU maps

🔥 Result: High hydrocarbon HC emissions, contributing to air pollution and poor fuel economy.