[Blue)(Fusion]

Check the EGR system. It is common for the DPFE sensor to accumulate water in it and give false information to the ECU which them commands the EGR valve differently than it should.

Remove the DPFE sensor located on the rear of the passenger side cylinder hear. Remove the electrical connector, two hoses, and two bolts. Tap it several times in your hand to remove the water from it. I even let it sit upright for an hour or two to let it air dry a bit. Reinstall it (ensuring the hoses are connected to the correct ports), and then try driving it again.

If that fails to work, check the EGR valve for blockage and a working diaphragm. With the engine running, if you apply vacuum to the port on the top of the EGR valve, the engine should sputter and run rough until it compensates for the EGR gasses.