So here is the deal. I recently added a calmini cone filter to my intake. It was a noticable increase in pep until now. Every thing was good for about a week, but the other day it started getting sluggish. The check engine light hasn't came on and all the gauges are normal. It feels like a bad plug or timing but I don't know. Has this been a problem with anyone else? I am stumped. Any help would be great. Thanks in advance.