Accelerate but no power

I would recommend that you check the transmission fluid level. If it is low, then the transmission will slip when accelerating, ( If this is happening, it can and will lead to major transmission issues) add fluid as needed (make sure that you are using transmission fluid that is designed for Ford Vehicles, as there are different kinds of transmission fluids, and if you add the incorrect fluid, it will cause damage to the drive bands in the transmission and render it incapacitated. If the fluid level is good, and the fluid is clean and does not have a burnt smell to it, you may have a clogged transmission filter, and simply need to replace it.
I hope that you have found this information to be useful, and if I can be of any further assistance, please let me know. Thank you for using fixya!