My car just failed emissions testing due to high NOx. At first last year the feedings where 1500 ppm over so I replaced my catalytic converter. This brought it down to 50 ppm over now it is at 200 ppm over. My question is if I put a second catalytic converter behind the first would this fix my problem
have the same problem?
Sunday, March 3rd, 2013 AT 10:53 PM