Hey guys so ever since I've been going to the new sams club gas station because it's like. 30 cheaper then the other stations near me.. So since then my exhaust pops when going over 4k in drive I also get a rotten egg smelling smell to.. No codes are thrown either I have an overkill pcm and thought that something could have got messed up with the tune so I pulled the negative cord on it to reset it.. That hasn't worked.. Any thoughts? Could it just be bad gas?