Hello, I've recently had an upper intake manifold with back 4 plugs swapped on a 2nd generation 03 expo 5.4. I went to pick it up, started it and it barely had power once iT idled than it did when I dropped it off. While observing vacuum lines front pcv valve hose elbow isn't connected. Back two hoses are running to the manifold as they should but the front one isn't. Anyone know where it connects or have a hose diagram?