Both valves are supplied with vacuum. After swapping hoses on the EGR valve and intake flap, the functionality of the two did, in fact, switch. Just to be sure if it was the electro-vacuum valve, I swapped electrical plugs as well and found that the valve that supplies vacuum to the intake flap actually did begin to work. If it is an electrical issue, where should I begin looking? I've already cleaned the plug and pins. Is there a fuse on the circuit I should be looking for? I should also mention that last night, with the car running warm, the EGR valve wasn't working at all. Now it works fine, but I'm still getting nothing out of the intake flap using the intended wiring and hose configuration. The wiring doesn't look to be degrading but I will check it more thoroughly.