Sounds familiar, a couple of years ago I had similar symptoms.  
 
	    First the Adaptive Cruise Control said it couldn't work.   Stopped, turned off engine, and sometimes it would work again, sometimes not.
 
	    Then the power loss, though I could still drive slowly.  Didn't notice an engine clunk, but I'm hard of hearing so I miss a bomb exploding.  LOL
 
	    Went to the  Ford Dealership in Redding CA.  I think by then I did have an engine code.  Long wait to get service so ...
 
	    I drove 200 miles back home and took it to my Ford dealer.  There was a known problem which they fixed free of charge and gave me a loaner for 3 days during repairs.
 
	        (Fortunately it didn't do additional damage to the engine to drive it home.)
 
	 
 
	Sorry, I don't recall the actual engine problem.  I'll try to remember to call them tomorrow and ask them to look up the service record.