ASE Auto Maintenance and Light Repair Certification (G1) Practice Test 2025 – Your All-in-One Guide to Exam Success!

A poorly maintained air filter can lead to several issues, particularly reduced acceleration and engine performance. The air filter is responsible for keeping dirt and debris from entering the engine's combustion chamber. When the filter becomes clogged or dirty, it restricts airflow into the engine. This lack of clean air can cause the engine to run rich, meaning there is too much fuel relative to the air, leading to incomplete combustion. As a result, the engine may struggle to produce adequate power, impacting acceleration and overall performance.

In contrast, a clean air filter supports optimal engine performance by allowing the right amount of air to mix with fuel, promoting effective combustion. When the air filter is neglected, the engine can lose responsiveness, impacting not just acceleration but also other parameters like fuel efficiency and emissions. Proper maintenance of the air filter is essential in maintaining overall engine health and performance.