What symptom might indicate a problem with ignition timing?

Poor acceleration can indeed be a symptom indicating a problem with ignition timing. When the ignition timing is incorrect, it can affect the engine's performance by causing the air-fuel mixture to ignite either too early or too late in the combustion cycle. This improper timing can lead to incomplete combustion, resulting in reduced power output, sluggish acceleration, and overall poor engine responsiveness.

For instance, if the ignition occurs too early (advanced timing), it can cause knocking or pinging, which further exacerbates performance issues. On the other hand, if the timing is too late (retarded timing), the engine may not reach its optimal power band, leading to a significant reduction in acceleration. Therefore, noticing poor acceleration prompts further investigation into the ignition system and timing settings.