The other cars looked like there was nothing coming from their exhaust. My car emitted greyish smoke, looks like abundant steam. Thats how I noticed. My cels are a code 6 (engine coolant temp. sensor), has been on since I did the gsr swap. I tried everything to fix it, but ill be taking it to the shop this weekend. Could this cause such emissions? (Im gonna check again today, its warm outside, so maybe thats the thing). Im just worried because I dont want to be burning oil or something like that.