While going down the road at highway speeds engine will cut out and restart again, will also start rough with the clouds of a poorly mixed smelling exhaust. Ran the ses code a few months bavk and got the common replace gas cap solution. Truck will run fine otherwise just the hiccups. Today i found a broken vac line from that black ball under the hood. Red fluid leaking out. Antifreeze or tranny? Both red. Could this at all be related? Capped the line with a sheetrock screw and made it home with no issues today, but also had a full tank of gas...maybe just a fluke? Four wheel drive does also not engage fully and maybe there is some relation to all of this???