How does engine sputtering in older vehicles contribute to increased air pollution in Pakistan?

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How does engine sputtering in older vehicles contribute to increased air pollution in Pakistan?

Older vehicles, which constitute a large portion of Pakistan’s transport fleet, frequently experience engine sputtering caused by worn-out spark plugs, degraded ignition systems, and inefficient combustion. This leads to higher emissions of unburned hydrocarbons and carbon monoxide, worsening urban air quality. What strategies can be implemented to improve vehicle health and reduce emissions from sputtering engines?

Talha Kyanii asked on 23 Oct 2025 16:46:20 pm

1 Answer

9 views |

Gari Master - on 23 Oct 2025 16:51:16 pm

Older vehicles in Pakistan are more prone to engine sputtering due to worn-out spark plugs, failing ignition coils, and degraded combustion systems. These issues cause incomplete fuel burning, resulting in increased emissions of unburned hydrocarbons HC and carbon monoxide CO. Since older vehicles make up a large portion of Pakistan’s vehicle population, their poor performance significantly contributes to urban air pollution and smog formation.

To reduce this impact, vehicle inspection programs, incentives for replacing old vehicles, and promoting maintenance practices such as timely spark plug replacement can improve engine performance and lower harmful emissions.