What would you expect to happen if you have ignition problems in an engine?

Experiencing ignition problems in an engine typically results in stalling and rough idling. This occurs because the ignition system is responsible for generating the spark that ignites the air-fuel mixture in the combustion chamber. If there are issues, such as worn spark plugs, faulty ignition coils, or problems with the ignition timing, the engine may not fire consistently.

As a result, you may notice that the engine struggles to maintain a steady idle and can even shut off unexpectedly when the ignition fails to spark adequately. This leads to an uneven performance that manifests as stalling during operation and a rough, unstable idling condition. These symptoms are significant indicators that the ignition system isn't functioning optimally, significantly impacting the engine's overall performance.

In contrast to this scenario, you would not see improvements in fuel efficiency, responsiveness, or lower exhaust emissions as these factors typically rely on a properly functioning ignition system to ensure complete combustion of the air-fuel mixture.