The shielding on my egr tube slipped down and the vacuum lines by it all burned up. I have 5 lines that need to be repaired. I will be using larger diameter vacuum hoses and heat shrink for the repairs. I saw some people using larger hose but with electrical tape. I will be securing the the egr tube shielding with stainless steel wire. I thought I was having an oil leak because of the smoke. Then the AC went to defrost and would not go to vent. Watching some videos about that I got to the idea of the burned vacuum tubes. I had to take the plenum off anyway and found no oil leak but only the burned vacuum lines. I hope this helps someone. Also I would like to know if anyone else has had this problem.