Emission Control Systems: Service Precautions

The Catalytic Convertor requires the use of unleaded fuel only. Leaded fuel will destroy the effectiveness of the Catalyst as an emission control device. Under normal operating conditions the Catalytic Convertor will not require maintenance. However, it is important to keep the engine properly tuned. Engine misfiring may cause overheating of the Catalyst. This may cause heat damage to the Convertor and vehicle components. This situation can also occur during diagnostic testing if any Spark Plug cables are removed and the engine is allowed to idle for a prolonged period of time.