My 1995 Toyota Corolla just failed an Ontario (Canada) ASM 2525 emissions test with the following readings:
HC ppm: 112 (limit is 75)
CO%: 0.45 (limit is 0.42)
NO ppm: 2040 (limit is 576)
The only noticeable thing is a leaking valve cover gasket which I have already replaced. Any ideas what needs fixing? Thank you.