On my 02 4.7, I had a DTC that said there was a plugged line in the LDP system. I found that the vent tube coming from the LDP vent valve had been taped to a wire bundle near the firewall at the factory, and that tape had dried up and let the tube fall against the exhaust manifold. It melted the tube in such a way that the end was melted closed.

I can't for the life of me find any documentation that shows where the end of that tube belongs. It routes from the LDP up toward the top of the engine on the drivers side.

Anyone know what this tube connects to?