Do you need a secondary air injection system?

Author's Note

There were times in my life I owned multiple cars, all of which would be in various states of modification and of dubious legal status. I was a polluter, and not particularly ashamed. On more than one occasion, I'd burn considerable extra gas (it was cheap back then!) running laps around the block before pulling up for my state emissions test. Now I'm a smug, car-free urban-dwelling public transit commuter, so reading up this topic with purely altruistic motives felt pretty good. It was like doing a few minutes of research to reassure a friend that yes, she'd definitely pass a pre-employment drug screen based on those foggy memories of when, where, and how much, while silently congratulating myself that I wasn't the one in the hot seat. In either case, rest assured: those pumps and pipes have a purpose.

Related Articles


  • Summit Racing. "Proform Smog Pump Eliminator Brackets." (Feb. 12, 2012)
  • State of California. "Smog Equipment Requirements for Used Vehicles." 2010. (Feb. 12, 2012)
  • State of California. "Vehicle Inspection Report Glossary." 2010. (Feb. 12, 2012)