Alright I got 8 3/8 SMC valves and the back left fill is messed up somehow. I have the valves in a manafold setup for now but when I try and lift the back left up it leting air come out through the dump. The dump valves came with air mufflers but they sound gay so I took them off and they are pointing up but are right under the back of my bed. Could trash had gotten in the dump valve and is causeing it to stay open. I can't figure it out and its making me mad!!! Please help cause I have to drive this thing Monday.