Like title states my 95 mustang failed emmissions, says " asm results FAIL" emission readings hydrocarbons(HC) 98ppm emmissions limit 60ppm. so im over by 38ppm whatever that means? I did quick google search and it lists 5 things it could be, thing is car has no check engine light and runs fine, car has cats and is tuned. passed emmisions ever since ive owned the car in 2005, havent changed anything besides my battery and starter its been same exaust etc since 2011, and last time it passed fine. this quick list says what it could be http://www.smogtips.com/failed-high-hydrocarbons-HC.cfm wanted to see what peoples input is I have 60 days to fix it and bring it back.