What Causes the Abnormal Noise When Accelerating in Mitsubishi Outlander?

1 Answers
VivianFitz
07/29/25 11:50am
Abnormal noise when accelerating in a Mitsubishi Outlander may be caused by excessive carbon deposits, poor filtration, or insufficient gasoline purity. It is recommended to clean the air filter in a timely manner. Specific causes: The noise could be due to aging spark plugs, engine issues, cylinder problems, or idle speed problems. If the air filter is clogged or excessively dirty, it can restrict engine airflow, allowing large amounts of dust to enter the cylinders. This accelerates carbon buildup in the cylinders, leading to poor engine ignition, reduced power, and increased fuel consumption. Solutions: Noise caused by excessive carbon deposits can be categorized into engine carbon buildup, throttle carbon buildup, or spark plug carbon buildup. For noise caused by poor filtration, the most common issue is a dirty air filter, which can be resolved by cleaning or replacing it at a repair shop. Carbon deposits formed inside the engine due to low gasoline purity (e.g., 90-octane gasoline being less pure than 93-octane) can be addressed by completely switching to higher-octane gasoline.
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