If you think the fuel filter is old, change it. They're not expensive.
Is the check engine light on? If so, you'll have to pull the codes.
This link is to the "READ FIRST-Technical information" thread on the FTE Ranger board...
https://www.ford-trucks.com/forums/s...d.php?t=107538
Do one repair/service at a time & note any changes in how your truck runs.
The guys on the Ranger board can help you through pretty much any problem/repair/service you need to do.
AL.