My 93 Seville has a 4.9 pushrod engine. Not Northstar. In doing routine maintenance I noticed, upon opening the butterflys and looking down into the throttlebody, there are two 1/2 inch dia pipes or orfices sticking up from the bottom of the intake manifold. They are just below the butterflys and centered under each intake hole. I 've cleaned the throttle body several times over the years with the typical over the counter spray but had never leaned over with a flashlight and looked real good. By holding the gas or butterflies wide open I could see these pipes sticking up and what appeared to be crud buildup blocking them. There must be a 3/8's inch hole in each one so I'm thinking how did all that get in there? Well,I started digging out the front one and using a vaccume with a straw taped on the end to keep things clean. The more sticky stuff I pulled out, I began thinking maybe thats some type of sealant from the factory and I'm messing up here. So now I've got the front one sort of cleaned out but don't know to keep on or to reseal this pipe. I 've not been able to find out anything on the internet so I'm sort of stuck. Any ideas form anybody? I got a clean straight wire and stuck down into the cleaned out hole and it seemed to be about 2 inches deep. But I can't tell what these pipes do or where they lead to.