Where is the fuel filter located and how do you replace it on a 1995 Ford Aerostar?

In the fuel line under the van. Special tools are required to change it available at the parts store. Ford uses a special tool to release the fuel line from the filter. The tool isn't very expensive and usually comes in a set of several different sizes. Generally speaking, Aerostar fuel filters are located under the vehicle, approximately under the driver's seat. Big cylindrical doohickey strapped to a bracket, and uses special clips to keep the hoses attached. Later models like yours may need a special tool to disconnect the hoses.