I actually noticed this morning a bit of the "new car smell" (or what I remember it to be; it's been about 12 years). I would say it's most likely the carpet as I didn't notice the smell last week when I was putting in sound proofing.I'm planning on doing this in future to get rid of the smell in my car (10 years of those accumulated "used car flavor" lol). Will you tell us, if there is a change in the smell of your interior?
I wish I could recommend the place I got my carpet. In fact, all I can do is highly recommend AGAINST them (Stock Interiors dot com). There are major wrinkles that cannot be pulled out, the floor pan mold they use while similar is way too shallow (rails under seats are about 3" tall where the carpet is only 1-2" deep), and it even came up short on one side where it was only 1/2" off but enough that the only way to not see metal was to tape a scrap in place. The overall quality/pile of the carpet is fine but it does not fit nearly as well as OEM. I got black which is not OEM so I need to find another company from which to order the next one.