Only after all other emission systems have been inspected for proper operation should you suspect a defective or bad catalytic converter. Since you need to check "one" specific catalytic converter it would be best to use the "intrusive" CAT Test method to determine exactly which cat, the front or rear, is damaged. Keep in mind the intrusive test only works if and when the rest of the vehicle's emission system is working properly.
Fuel control must be accurate, the engine should not have compression or ignition trouble. A simpler test, but less accurate and one you can do at home using an infrared thermometer, is a Temperature Test. Using an infrared thermometer measure the exhaust temperature at the CAT's inlet, and then measure the temperature at the CAT's outlet. You should see at least a degree temperature increase at the outlet. This is especially true if your car is very old, has a lot of miles on it, is not particularly reliable, and you live in a state with tough smog laws.
A new catalytic converter will not impede fuel mileage much, if at all. A chocked or plugged catalytic converter, on the other hand, removing or replacing it can give you a small increase in fuel economy as well as an increase in horsepower. If it is plugged the fuel economy and horsepower will increase. Check the exhaust system under your car. There are also two main types of emission standards. Depending on which type of catalytic converter you choose, your costs could vary.
Direct-Fit: Direct-fit catalytic converters are specially designed for your specific make, model, and year of vehicle.
Universal Fit: Universal fit catalytic converters fit any vehicle, but they take more work to install.
The parts tend to be cheaper, although you may pay higher labor costs. Federal: Federal catalytic converters meet emission standards set by the United States government. These catalytic converters meet emission standards in most states and will allow you to pass a smog test. However, they are not strong enough to pass smog tests in California, New York, Colorado, Maine, and other states with stricter emissions standards.
These standards are stricter than federal standards. These costs include parts and labor. Specific replacement costs vary based on the make and model of your vehicle. Specialty cars, rarer cars, and foreign cars tend to have higher catalytic converter replacement costs, for example, while domestic cars and common cars have cheaper replacement costs. Costs also vary based on the quality of the replacement converter. Some catalytic converters are cheap and basic.
Others are custom-fit, specialty converters that maximize vehicle performance. Quality of Catalytic Converter: Cheap catalytic converters have a lower density of internal particles like palladium and platinum.
These metals are expensive, and higher-quality catalytic converters have a higher density of particles, making them more effective for reducing toxic emissions. Not all catalytic converters are created equal. Vehicle Make, Model, and Age: Cheaper vehicles tend to have cheaper catalytic converter replacement costs than more expensive vehicles. Additionally, older vehicles tend to have cheaper replacement costs than newer vehicles. Labor Costs: Different regions have different labor costs.
Mechanics may need to cut away the old, welded converter, for example, and clamp in a new unit. Your vehicle may have other issues causing it to fail. Until the professionals replace your catalytic converter, you may be unaware of these issues. Your vehicle might have other problems that caused your first catalytic converter to fail, for example. These problems could add thousands to the cost of repairing or replacing your catalytic converter.
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