I've replaced the O2 sensor as well as the spark plugs and it STILL didn't pass inspection. All the mechanic said was "Needs a tune uppa sumthin'". Service lights coming on, so he said there couldn't be any fault codes. Where do I go from here?
Here are the actual numbers for the Massachusetts inspection:
HC ppm @ idle: 0833 0220
CO % @ idle: 06.22 0.120
HC ppm @ 2500rpm: 0626 0220
CO % @ 2500rpm: 03.55 01.20
so...as you can see, the only thing that's remotely close is the CO % @ 2500rpm. I'll post the original numbers when i get a hold of them. Though, just from memory, I know the HC @ idle is HIGHER, the CO @ idle and HC @2500 are about the same, and the CO @ 2500 is LOWER.