1. My truck is a 2017 F150 3.5L v6 Naturally aspirated. I’m not sure if it matters but it’s Flex fuel.

Howdy, I have had an issue with a P219B for a while now. I’ve changed our spark plugs, checked for vacuum leaks with a smoke machine. Yesterday I replaced all the fuel injectors. The truck feels great don’t hear noises like rattling or such, however when i’m driving at 30-75mph every now and then i’ll hear a rattle/scratchy noise coming from engine when accelerating. My truck feels great when it idles and such.

I turned my key over to check if truck was ready for an emissions test in which it wasn’t drive it for a drive cycle according to fords owners manual and then kept hearing the noise. When I got home after doing it I noticed the truck wasn’t ready for emissions still doing the same key turn over etc. I plugged in a scanner in which i  now got 3 new pending codes being P2098, P2196, and P2198. 

I came to realize my truck was similar to the 3.7L v6 on a Mustang 2014, so I found a video that said to take off purge valve while truck was on and disconnect the sensor with it and see if purge valve had suction without power to test if you needed a new one. I did not put everything back to normal and ran the scanner again. Now the codes still temporary but 2 codes went to the permanent section with the p219B (manufacturer control) being the p2196 and p2198 i believe. 

Im not sure what im doing anymore and honestly feeling worst as the time goes by.

I believe the truck is running better but afraid im just trying to fix something and messing it up more.

If anyone knows why the sound i described is being made, what could possibly do with the codes and help me out understand. I would greatly appreciate it. 

I truly don’t want to take it to a mechanic but will if yall believe this is the best solution.