My 1991 integra wont pass emissions. the NOx level is too high. im trying to get it fixed and dont really know where to start. i was first told the egr valve come to find out my car never had one. now i am told the PCV valve which i cant seem to find. when i start the car it idles at 1400rpm. but as i drive it for a bit it goes to normal 600-800rpm. its a B18A1. all stock.
225.1 KB Views: 15