Ok, here's the deal, today I was changing oil, and I had it draining, and I had a little time to just dink around under the hood. I noticed that there is a fuse panel located kinda near the coolant tank. on the passenger side of my car, and I was reading what fuses were in there, the norm, and I read one, air pump, what is an air pump exactally, and what does it do? Just wondering.

Air pumps were installed on some later model luminas to help reduce initial start-up emissions from the car. It works by pumping fresh air into the exhaust manifold, which reacts with everything else in that good old catalyctic converter. When the car warms up a bit, a solenoid closes the valve to prevent backflow from the exhaust to the pump.

oh, OK, thats what its all about, thanks