2016 RRS L494 TD6.

I recently tuned and deleted the EGR, DPF, DEF, and Auto Stop/Start. Last week recently..

Before the tune, at idle and stopping at stop lights I was smelling "post" DPF catalyzed exhaust fumes in the cabin. Post Tune, I am smelling OG diesel exhaust fumes at idle, and at stopping and taking off. Any ideas, or where to start looking? On a side not, I am extremely happy with the Tune, and I no longer have to worry about DPF issues.. Fun part was hollowing out the CAT, DPF, and welding it all back up. But for $500 USD for the tune w/ free worldwide shipping, I've saved myself potentially $10,000 on replacing the DPF/SCR exhaust system. Also increasing my fuel economy, faster throttle response, and smoother shifting. Plus, now the torque monster can finally breathe.