I am still trying to fix my P0171 code. Found that 2 bolts were missing from up plenum, no more leak from intake, but I put a bore scope under the upper manifold and noticed these 2 hoses, one had the hose on it the other did not, the other end of the hose was attached to nothing, I found another hose seemed like it was attached to the block a little under the manifold, where do these 2 hoses go to and what do they do? I have my EGR already bypassed, so I’m wondering if these are causing my vacuum leak or if I can just plug them up. I have attached a photo of the 2 hoses I am taking about.