Hi,
I am hoping somebody can help me out.
My 1996 1.8 Mondeo passed its mot

, but I noticed that the emissions have risen dramatically over the last 4 years.
2007 HC 36ppm
2008 HC 47ppm
2009 HC 134ppm
2010 HC 170ppm
Car runs fine, and has had new plugs leads, all filters.
BTW CO emissions barely changed over the 4 years
Thanks for any advice anyone can offer