While routing the MAP sensor wiring, I noticed discoloration of the silicone MAP tubing. Upon further inspection, the discoloration was present at every Adel clamp. I have to assume that there is some chemical reaction going on between the Adel cushion and silicone as the discoloration will not come off the silicone. The silicone also feels different than other sections of tubing without discoloration.
I decided to replace the silicone tubing with traditional rubber tubing. This was accomplished and all tubes were secures using standard practices.