Didnt pass smog last weekend. I was at 242 ppm and needed to be at 220 ppm for hydrocarbons. I need to pass this weekend so i was thinking about using denatured alcohol, i just have no idea how much to use or the consequences of using it. If anyone could help it'd be appreciated.

 

i just used it for smog about a month ago...my HCs dropped but NOx levels went up