Im on my 2nd battery and 3rd starter and my 2016 f150.5.0 v8 still does not have a consistent clean start. Sometimes it seems weak, no crank or click, sometimes cranks for a few seconds and sputters on. I believe this all started when I had someone install a 7 way trailer hook up to replace the 5 way that was on the truck. Im looking for any advice or things to look at to find out the problem. Another weird thing that may or may not be related is the stereo will not turn on occasionally. Happens about once every 6 months or so and I also didn't notice this before the 7 way install. Any help is appreciated.