so I went diving under the tank a little extensive and ran across these parts ( in pic 2) so I know the top right is a temp thermocouple..... but what are the other two ??? Both are plugged in but on the backside only one has a hose ran to it.... the right one ..... it's ran down. To the throttle body (picture 1) but the left one has a hose "bib" but nothing connected..... but then I have a t that has a block off in it ????picture 3 any ideas orknowledge would be appreciated ......