Hi guys, I have responded to a couple of posts here, but this is my first topic... I have noticed that when in Sport or Baja (in 2WD) I am getting a backfire a second or two after I let off the gas. Has anyone else had this issue/noticed this? I am running mid-grade (91 Octane). The only mod that I have done (so far) is the Borla ATAK exhaust system. The truck has ~3300 miles on it. Any insight would be greatly appreciated!! Thanks!