I deleted my heatercore pipes and coolant lines that run through to the egr spacer like 3 weeks ago because of coolant leaks that i had .Since then there has been no leaks at all and everything is perfect. But i noticed that when i hit the pedal hard lately it smells like smoke in the engine bay. Also i haven't plugged the 2 pipes that stick out of both sides of the egr spacer.I went to get the plugs the other day at autozone but they didn't have them. Should i plug them,and why does it smell like smoke when i really run the car hard? Is this normal?