Three element flow meter | May I ask why the BMW 320 has unstable idle and the catalytic converter burns red?

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Is it normal for a three-way catalyst to break down frequently after two or three years. The service life of a three-way catalyst is usually relatively long, lasting for 5 to 10 years or even longer. Under normal use and maintenance, the three-way catalyst is not easily damaged. However, if the three-way catalyst frequently damages within two to three years, it is often caused by various factors such as forest disturbance and dust. 1. Oil quality issues: using low-quality or gasoline containing excessive impurities and sulfur components can directly affect the activity of the catalyst, leading to its premature failure. 2. Poor driving conditions: the vehicle is in idle or low-speed driving for a long time, and the catalyst temperature cannot reach the temperature range required for normal operation, which will reduce the conversion efficiency of the catalyst and accelerate its aging process. 3. Engine problems: the vehicle has gas leakage problems, resulting in incomplete combustion of the engine and the generation of a large amount of harmful exhaust gas. The harmful substances in these exhaust gases can react with catalysts, causing catalyst poisoning and loss of effectiveness. 4. Emission system failure: Malfunctions in the vehicles emission system, such as oxygen sensors or air flow meters, can lead to unstable engine operation and air-fuel ratio imbalance. This not only affects the performance of the engine, but also further affects the lifespan of the catalyst.

5. Bad driving habits: Frequent rapid acceleration and emergency braking, among other bad driving habits, can increase the load on the engine and generate excessive harmful gases.

. These gases will accelerate the catalysts failure process and shorten its lifespan. Therefore, if frequent damage to the three-way catalyst is found, the above potential causes should be immediately checked and repaired in a timely manner. At the same time, it is recommended that car owners use fuel that meets the standards, regularly check the working status of the oxygen sensor, ensure the air-fuel ratio is normal, and try to avoid prolonged idling or frequent short distance driving.

2. Which flowmeter is more stable?

3. May I ask what is the reason for the BMW 320s unstable idle and the burning of the catalytic converter?

1. Unstable idle speed and dryness are usually caused by abnormal fuel injection, intake failure, or ignition failure

2. Three element burning red represents high exhaust temperature. Fan Qinfengs hole circumference is reduced, and excessive fuel injection cannot be completely burned in the basic three element combustion

3. The hose after the air flow meter leaks, and the computer thinks the mixture is lean, so it sprays more fuel

4. The rear of the three element is blocked, the exhaust is not smooth, and heat accumulates in the three element. 5. Timing failure ignites too late

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