Ok so i have an 04 coupe EX V4. i was adjusting the intake, when i was finished i turned to car on just to make sure she would turn over, i gave it a little gas and heard a pop. So i ran to the engine and looked around, couldnt see anything, jumped under the car, not leaking anything. Went back into the car and the engine light was on. So i turned the car off, turned it back on and the light didnt blink, it just stayed solid. I drove it around the block and everything sounds fine. The pop sounded like it came from the filter itself. Im gona bring it to my mechanic tomorrow, but any clues on what it might be, or how much it might cost to get fixed?