hey everyone. today i took my 2015 si to the dealer to get my new plates. after receiving the car back, my CEL came on. before leaving, i had them check it out. on the car, it said check emissions. on their scanner, he said it was because my car was running rich. he said sometimes it's a fluke, so he cleared it and off i went. here's my issue. i put a 3 inch intake on the car last week. everything feels great, no issues. now that my CEL came on and it's been cleared, i almost feel as if i've dropped some torque. almost a bit hesitant on acceleration in 2nd and 3rd gear. could i possibly have a vacuum leak which is causing the ECU to dump more fuel in? the car is 100% stock aside from the intake. i know a 3.5 inch intake requires a tune, so i opted for the 3 inch until i start building the car in a few months. any help would be greatly appreciated.