what is your warranty situation ? are you within in factory warranty, do you have an aftermarket or extended warranty? For the most part the "ticking" sounds and the like are from loud lifters, ecoboost engines, whether they are I4 or V6 tend to sound like they are knocking or ticking even though they are idling and running normal, at least this is what has been told by dozens of ecoboost owners every time I get paranoid about engine noises. I've learned to just deal with it. I've had my vehicle checked several times by Ford. Everybody I talk to with that owns the 2.3 ecoboost mustang seems to think my car sounds normal. I had a bad issue with my engine at 31K miles, but I can't figure out if it was my fault or not. I had a mechanic put aftermarket sparkplugs in the car, about 100 miles later of driving, my engine failed, I think the head gasket failed so bad it destroyed the top end of the motor, I really don't know. Ford fought me on it for a few days, but I kept the pressure on them. I spoke to several mechanics, they said even if it were the sparkplugs that caused the engine to fail, there would be no way for Ford to verify if it was the sparkplug failure that destroyed a piston, destroyed the cylinder wall, throw a rod, and destroyed a head gasket. After about a week of waiting for the dealership's engine specialist to come back from being sick, they tore down the engine, couldn't prove it was the sparkplug that caused the damage, they gave up and covered the cost of the long block overhaul, and a month later I got my car back with a new engine. 20K miles later,it still runs strong, and still makes those weird ticking sounds and what not, I had the car checked a few ties after that, even performed diagnostics on it myself using my Ford performance software, no DTC's no codes.
My thoughts on the noises you are hearing, I say have Ford look at the car. Do your research on ecoboost engines, most owners have noises that sound like ticking or knocking, but usually the engines are fine. I still do research every week about these engines. I still listen every day to my engine as it idles cold and warm, what it sounds like an the freeway/highway, what it sounds at revving. I still get paranoid about the noises, but after researching this car and other ecoboost engines for 15 months, most of the noises if not all, are just normal operating noises. Keep good care of your engine, do everything you can to maintain it. Research, research, research. I can't stress that enough. I'll help you out with a few things here. here are some suggestions by a Ford tech on youtube.
View: https://www.youtube.com/watch?v=0irwbwpuEbQ
View: https://www.youtube.com/watch?v=v6h_FOzFMcs