Hey guys

Alright so my cars been backfiring for a lil while now and i assumed it was a bad wire or something and im due for a tune up anyway i just havent the time right now.

So i was under my hood today before i had to leave for school and i was putting the headlights down cuz we were gonna do my car today and i didnt want them up ..and i adjusted my air intake and thats all i touched. So i start the car up and no backfiring at all...no matter how high i rev and how quickly i let off the throttle.

I drive to school and its fine until i get off Route 22 to SCTI and it starts backfiring again?!?!? So my question is if its not always doing it then what might be the problem and why would it only do it sometimes and not other times?

thanks