Get cheap mechanic's stethoscope.
On the passenger side of the engine , just in front of the firewall , there is a camshaft syncronizer.
It looks like a shortened version of the old style distributors.
Place the probe against the shaft of it.
If you here any screeching noise , it needs to be replaced ASAP.
This unit drives the oil pump and is a known failure part.When it goes , so does your engine.
DO NOT purchase the cheaper DORMAN unit .
Buy an original FORD replacement.