Emission Control and Exhaust
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Putting the pedal to the metal is a blast. If your ride has a fully functional emissions control and exhaust system, it can be environmentally conscious too. Your vehicle's emissions control system works to diminish the amount of air pollution causing emissions.
Your vehicle's exhaust and emission systems are responsible for managing harmful gases like nitrogen oxide, carbon monoxide, and hydrocarbons. These gases mostly come from the crankcase, engine exhaust, and the fuel tank and carburetor.
The crankcase houses the crankshaft in the engine block below the cylinders. Leaked combustion gases would fill the crankcase if not for the positive crankcase ventilation (PCV) valve. The PCV valve combines leaked combustion gases with ventilating air, then it returns the mixture to the combustion chamber for re-burning.
Engine exhaust emissions make up two thirds of your vehicle's emissions. They are handled by two emission control systems: the air-injection and exhaust gas recirculation (EGR) systems. The EGR system directs some exhaust gases to the cylinder head. The exhaust is combined with air/fuel mixtures in the cylinder head before re-entering the combustion chamber.
The PCV and EGR systems make the most of your vehicle by combusting gases that would otherwise escape into the atmosphere. These dangerous gases are mostly burned out of the mixture by recirculation through the engine. After that, the catalytic converter cleans the exhaust before it reaches the mufflers and exhaust pipes.
The third site of emissions is the gas tank and the carburetor. Back in the day, gas would evaporate and escape from them. The escaping vapor consisted of the lighter elements in gasoline, which frequently contribute to smog. Now the EPA requires the use of an evaporative emissions control system (EVAP). EVAP uses special fuel tank specifications, secure gas caps, and a liquid vapor separator so fuel can expand without leaking evaporative emissions.
Aftermarket emissions control parts from AutoZone can help your vehicle run cleaner and more efficiently. To ensure your emissions system is working properly, inspect all vacuum lines and hoses for wear and tear, like cracks and leaks. Make sure your check engine light is off too.
Improve your vehicle's performance with emission control system parts from AutoZone. Our products are designed to fit your vehicle's make and model, so you can easily find the right replacement parts at AutoZone.
Get free next day delivery, or buy online and pick up your parts in an AutoZone near you today.
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