Working on my 96 LC, replacing some missing bolt, put my hand thru the upper and lower manifold and noticed to the left (facing the manifold part of the engine) to the left a hose dangling which appeared to come from the upper manifold, another hose dangling which appeared to come from the TB, and a 3rd dangling pointing towards the front of the vehicle, this one had another hard line right next to it with no hose or anything on it, so I bypassed my EGR how important are these under there? Can I block them off? I plugged each one with a nail and no change to how the motor ran. Any advise would be helpful, there are 3 hoses but 4 ports,