98 XLT Rough Idling

[rockinr]

I had a blown head gasket on my 98 XLT 4.0 OHV. I replaced it myself, everything is back togather. Execpt that I have one vacuum line on the passenger side that I have no idea where it goes, and when I start it up it runs rough. I have new plugs and wires, the coil pack checked out okay. I am at a lost. Please help.

Rockinr

 

[rockinr]

I have located the other vacuum hose connection. I still have the rough idle. I have a P0125 engine code. I am going to replace the T-stat.