What problem does intake ice primarily cause?

Intake ice primarily causes problems by blocking the engine intake. This occurs when moisture in the air condenses and freezes at the intake manifold, restricting airflow to the engine. When ice builds up, it can obstruct the air passage, which affects the overall performance of the engine. This can lead to a reduction in power and efficiency as the engine struggles to draw in the necessary air to maintain optimal combustion. Therefore, the main concern with intake ice is its capacity to hinder proper airflow, ultimately impacting engine performance.

In contrast, while some may think that intake ice could enhance airflow or improve throttle response, the reality is that the blockage created by ice does the opposite. Instead of facilitating better airflow or throttle performance, the ice impairs these functions, leading to notable operational issues.