Update. Took it somewhere to have it diagnosed before tearing it all apart. They had it for like 6 hours and said it sounds like a piston hitting and I need a new motor. Should I take that to the bank? Or should I get a second opinion?Sent from my SAMSUNG-SM-G930A using Tapatalk

2005 fx4 5.4L v8 4wd crew cabStarted out getting a buck every now and while giving it very low throttle (ex. While maintaining speed up a slight incline) Also having hard starts (would sound loud and shook a little for the first 3 seconds or so after starting. Eventually the bucking got bad...