What are the symptoms of an intake pipe leak?

1 Answers
LucyFitz
07/29/25 4:52pm
When there is a leak in the car's intake pipe, symptoms such as weak engine operation, increased nitrogen oxide emissions in the exhaust, and difficulty starting may occur. Since the engine requires a higher concentration of combustible gas mixture during the starting process, and an intake pipe leak causes the combustible gas mixture to become lean, it will lead to difficulty in starting the engine. Below is an introduction to the car's intake pipe: 1. Since the air sucked into the engine from the intake pipe crack does not pass through the air flow sensor, this part of the gas will make the combustible gas mixture in the engine cylinder lean, resulting in weak engine operation. Since nitrogen oxides in vehicle exhaust are generated under high-temperature and oxygen-rich conditions, an overly lean combustible gas mixture will further promote the generation of nitrogen oxides, thereby increasing the emission of vehicle exhaust pollutants. 2. Under normal circumstances, a leaking intake pipe can still be used, but it will suck external dust, sand, and other impurities into the cylinder, causing severe wear to the cylinder liner. The engine's intake system consists of an air filter, intake manifold, and air flow meter. Its main function is to provide the engine with clean, dry, sufficient, and stable air to meet the engine's needs, while preventing impurities and particulate dust in the air from entering the engine combustion chamber, which could cause engine wear.
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