How to recharge air in 1988 ford econoline?

A 1988 Ford Econoline doesn't have a system for "recharging air" in the same way a modern car might with its air conditioning system. There's no simple "recharge" like adding air to a tire. Instead, you're likely referring to one of two things:

* Air Conditioning (A/C) System: If your Econoline's A/C isn't blowing cold, it needs a refrigerant recharge. This is not a DIY job unless you have experience with automotive A/C systems and the proper tools (vacuum pump, gauges, refrigerant). Refrigerant is also under pressure and needs to be handled carefully to avoid injury and environmental damage. Take it to a qualified mechanic or A/C specialist.

* Tires: If you mean inflating the tires, you'll need a tire pressure gauge and an air compressor or a service station air hose. Check the sticker on your driver's side doorjamb for the recommended tire pressure for your Econoline. Inflate your tires to that pressure.

In short, clarify what "air" you're trying to recharge. If it's the A/C, get professional help. If it's the tires, it's a simple job you can do yourself (or at a gas station).