When the filter was replaced, did any foreign pieces come out of the filter?
The data you gave helps. (Engine jerks at 40-50 mph then stalls) Does sound like a fuel issue.
Questions -
Any idea of how much fuel in the tank when the last stall took place?
Key on engine off can the fuel pump be heard?
I suspect an issue with the fuel pump driver module. .The Fuel Pump Driver Module controls the voltage delivered to a vehicle's fuel pump. The fuel pump varies the amount of pressure based on the amount of voltage.
The fuel pump driver module in the 2008 Ford Escape is mounted on the body under the back of the vehicle. It is located in the
rear driver's side wheel well, behind the fuel tank
Inspect the module for external damage or dirt. It looks like the attached. These can get over heated and not function correctly. You might pull the connector and inspect and clean as needed.
Post back as to what you find.
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