I have a 94 maxima SE and i am putting a air/fuel ratio guage on and i wanted to know if anyone has pics of where the o2 sensor is or can tell me where it is located. I also wanted to know if anyone knows what a pop charger is and what does it do and where can i get one. Thanks

 

A popcharger is an intake that replaces the stock airbox but not the intake piping. Jim Wolf Technology and Stillen sell them, but you can get a cold air intake for about the same price, which will yield more power. As for the O2 sensor, it is located on the down pipe (y-pipe) before the catalytic converter. I think people tap the O2 wire at the ECU when they install a gauge though (I've never done it so I don't have any firsthand experience with it).