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Hello, the TCM is transmission control module. When you swapped out the module did you have it programmed to the vehicle?
are you getting codes for the throttle control? do you have a way to test for codes?
I am still hear. did you install a new throttle body? Usually a bad throttle body will cause the vehicle to go into a limp mode or possibly stall.
The throttle actuator motor is part of the throttle body? Was it an aftermarket company that you were able to buy this part off of?
The throttle motor may be replaceable but not through Ford for this very reason. What is the warranty of the part you installed?
Not that but if your concern was fixed for several months with this new part I would have them warranty out the part and use another one. If it fixes it this time again you know its the throttle body. If the replacement part is from Dorman which is what I suspect they have a very high failure rate.
That is how I diagnose vehicles if something fixed it for a while but you still have the same symptoms I would say the new electronic part has failed. Since they are covered under warranty it is an easy process of elimination. Most manufatures have been having issues with there electronic throttle bodies. Also please remember to rate my answer so I receive credit for assisting you. We can still speak after I receive a rating if you have further questions also.