yeah you need the fuel pressure regulator hooked up!! as far as that orange plug, you check to see if it's for the air temp sensor? I'm pretty sure it is. You have 3 plugs that look similar and go in about the same place under the manifold. you have the idle air valve, that aws valve, and the air temp sensor

 

I am going insane with all these hoses. Does someone have a diagram that shows where the yellow dotted hose goes.

all the diagrams I have don't say where it goes.......