Excess oil can foul the spark plugs:
Too much oil can cause the oil level to rise in the engine, which can lead to oil seeping into the combustion chambers. This oil can then foul the spark plugs, preventing them from creating a spark and igniting the fuel mixture. This can lead to misfires, which can damage the catalytic converter.
Excess oil can cause the oxygen sensors to malfunction:
The oxygen sensors in your car are responsible for monitoring the amount of oxygen in the exhaust gas. This information is used by the engine control unit (ECU) to adjust the air-fuel mixture. If the oxygen sensors are fouled by oil, they can send incorrect signals to the ECU, which can lead to the engine running too rich or too lean. This can damage the catalytic converter.
Excess oil can cause the catalytic converter to overheat:
The catalytic converter is a hot component of the exhaust system. When the engine is running, the catalytic converter can reach temperatures of up to 1,200 degrees Fahrenheit. If there is too much oil in the engine, it can cause the catalytic converter to overheat and fail.
Here are some signs that your catalytic converter may be damaged due to too much oil:
* The check engine light is on
* The car is running rough
* The car is stalling or hesitating
* The exhaust smells like burnt oil
* The catalytic converter is glowing red
If you suspect that your catalytic converter is damaged, it is important to have it inspected by a qualified mechanic as soon as possible.
