How does city traffic and stop-and-go driving in Pakistan impact the health of the catalytic converter in Changan Kalam?

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How does city traffic and stop-and-go driving in Pakistan impact the health of the catalytic converter in Changan Kalam?

Slow speeds and short trips may not allow the exhaust system to reach optimal temperature. Is this preventing proper self-cleaning of the converter?

Lubaba asked on 25 Jun 2025 14:06:49 pm

1 Answer

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Car Mechanic Expert - on 25 Jun 2025 15:31:38 pm

Urban driving leads to:

Short trips where the exhaust never reaches optimal temperature 250–400°C needed for self-cleaning.

Frequent idling and stop-go conditions cause rich fuel mixtures, which overload the converter.

Slow combustion and excess fuel damage the ceramic honeycomb inside the converter.

➡️ In cities like Karachi and Lahore, this is a major reason for premature catalytic converter clogging.