I’m about at the end of my rope here. I’m almost certain it’s a vacuum issue. Replaced some lines I thought were leaking. Checked the 4WD, it engages hi, lo and back to 2HI. I’ve checked connections everywhere I could find and nothing is off. Brake pedal is stiff before I start it as well. Used to get an EVAP code but it’s gone away and doesn’t even show in the memory when I scan it. Anyone seen this or something close before?