Explorer cruising Florida

Here is my 97 xlt 4-door just brought it home a month ago. Going through the necessary repairs and cleaning. With only 121,600 miles and an overall great condition to start with, I believe we will have many miles of road behind us. Just replaced thermostat housing, fuel filter, oil &filter, air filter, cleaned maf, 2 rear interior door handles, the truck came with a newer set of of tires less than 6 months old. The only problem that remains is the dreaded p0171/p0174 engine codes, however that will be resolved next week as I have an appointment with Ford diagnostic specialist. And whatever the issue is I will do the repair, most likely intake o-ring seals. Trans shifts flawlessly and the 3:73 limited slip rear axle appears to have recently been serviced. Any advice is greatly appreciated. More pics after thoroughly detailing the entire Explorer in the near future. Much appreciated, Keith