1, fuel: high-sulfur fuel oil is easy to form chemical complexes cause congestion, the use of lead or manganese antiknock, poor quality oil, gum and more easily clogged gasoline catalytic converters. China has prohibited the use of leaded gasoline, but some areas are still illegal use of lead anti-knock agent. Ethanol gasoline in the combustion chamber is easy to form coke, while the intake system, combustion system glial coke flushing effect, rinsed off easily clogged glial coke catalytic converters.

2, oil: Long-term use of sulfur, phosphorus antioxidant oil is likely to cause clogging of the catalytic converter.

3, roads: cars produce incomplete combustion at maximum acceleration, deceleration conditions, long-term driving on congested roads likely to cause clogging of the catalytic converter.

4, fuel injectors and intake to avoid demolition cleaning maintenance: cleaning process wash down a large number of glial coke cause clogged catalytic converter, which is the vehicle fuel injectors and intake to avoid demolition increase fuel consumption after cleaning conservation the reason.

5, the vehicle with a turbocharger prone to clogging of the catalytic converter, which is mainly caused due to the improper operation of the driver.

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