Question

Ignition system misfires will cause which emission(s)?

1) HC
2) NOx
3) CO
4) All of the above are correct

Answer 1

Ignition system misfires cause increased emissions of HC, NOx, and CO, as they all are by-products of incomplete combustion. All of the listed emissions are correct as misfires can lead to a higher level of these pollutants. Therefore, a well-functioning ignition system is crucial for controlling vehicle emissions.

Step-by-step explanation:

Ignition system misfires will cause the emission of HC (Hydrocarbons), NOx (Nitrogen Oxides), and CO (Carbon Monoxide). All of these emissions are by-products of incomplete combustion within an engine. When a misfire occurs, unburned fuel is released into the exhaust system, increasing HC emissions.

It is important to note that normally, a car's catalytic converter would mitigate these emissions by converting them into less harmful substances like CO₂ and water vapor. However, with misfires, there is an over-saturation of pollutants, and the converter may not be able to convert all the excessive HC, NOx, and CO produced.