When My rpms go above 2000 while going up hills in my 2011 Touring, a major sulphur smell invades the cabin and lingers for quite a while. I’ve had Cats checked. No rattle. No CEL. Seems worse when going uphill. I’ve tried Cat cleaners and other gas additives but nothing works. It almost seems like it’s coming through the cabin and not out the tailpipe. Possible exhaust leak? Uphill connection? Very irritating, embarrassing and worrisome. Any suggestions?