catalytic converter

The catalytic converter “cat” for short was developed back when carburetor was still being used on production vehicles. They were made to clean up hc or hydrocarbon emissions (unburnt gas) They do so by means of a catalytic reaction, meaning the hc’s chemically change to something not harmful. Catalytic converters have progressed through the years. At one time they had an air tube running to them, because the have to stay close to a correct air to fuel ratio. They would regulate air to control the reaction so that the catalyst would not overheat and burn up. Cats also need some heat to work properly, and do not do well at startup. This is why some manufacturers have had to add pre-cats that heat up quickly so that they pass manufacturer emission requirements. catalytic converters can sometimes malfunction and cause the engine to run poorly and not have much power. Usually if your driving up the interstate and pull over to look under the car it will be glowing if the cat is plugged up. Unfortunately the only true test is to remove it and look inside of the converter. The converters either have beads in them or normally have honeycomb layers. If damaged pieces will probably be turned sideways or fall out when you remove them. Many times you can replace your converter for cheaper, if you use an aftermarket high flow converter. The high flow catalitic converter will probably give you better fuel economy and power due to less restriction. High flow catalitic converters are also safe to pass emission tests if you are required to do so.