Smog pumps, also called air injection pumps or secondary air pumps, are an important part of a vehicle’s emissions control system. Their job is to inject clean air into the engine’s exhaust stream so that unburned fuel and pollutants can continue to burn before exiting the tailpipe. This helps your vehicle meet emissions standards and run cleaner overall.
At Black Canyon Smog Pump, we specialize in restoring, rebuilding, and supplying quality smog pumps and related components for classic cars and trucks. All products from our eBay inventory will soon be available right here on this website.
A smog pump is a belt- or electric-driven device that forces fresh air into the exhaust manifold at the point where exhaust gases are hottest. By introducing oxygen here, remaining fuel vapors can continue to burn, significantly reducing harmful emissions like hydrocarbons and carbon monoxide.
These pumps are commonly found on older and classic vehicles and were originally required by emissions regulations. Today collectors and restorers want them installed and working correctly to maintain authenticity and preserve vehicle functionality.
Smog pumps operate as part of the secondary air injection system. Fresh air is pumped into the exhaust stream just after the combustion process. The extra oxygen allows unburned fuel particles to continue burning as they travel through the exhaust system. This promotes more complete combustion and lowers the amount of pollution that leaves the tailpipe.
Most vehicles with this system use either a mechanical vane pump or an electric air pump. When the engine starts or reaches operating temperature, the pump delivers air through hoses, check valves, and a diverter valve into the exhaust ports to support cleaner emissions.
Even though smog pumps do not directly affect engine power in a major way, they are essential for emissions compliance and environmental performance. Vehicles without proper smog pump operation may fail inspection in regulated areas and can produce more exhaust pollution.
For classic car enthusiasts and restorers, a properly functioning smog pump:
A smog pump that is worn or failing can lead to decreased oxygen delivery to the exhaust system, potential emissions issues, and poor performance during inspections. Some common signs include:
If your smog pump shows these signs, our professional rebuilds can restore reliable operation.
All of the smog pumps listed on our eBay store will be added to this website soon. You will find a wide range of restored and remanufactured units for classic GM, Ford, Mopar, Jeep, Corvette, and many other makes and models.
Each unit is rebuilt with care and inspected for dependable performance so you get authenticity and quality you can trust.
