Thanks to everyone for the additional replies and the information… again, I’m learning a ton and I appreciate you guys taking the time to help me.
The shop was super busy yesterday so they didn’t have a chance to complete the inspection until today. Just got a call that there were two cracked spark plugs. No idea how that happens in 4k miles (previous owner said they were replaced at 35k) but that’s what they said was causing the issue. Is there any larger problem with the truck that could have caused the plugs to go bad so quickly? Something I should ask them to dig into or check out? Certainly don’t want this to keep happening.
Anyways, dealership is paying for the fix so I’ll be getting 6 new motorcraft plugs and 2 coils, then they’ll test it out and make sure it’s good to go.
When they checked the codes, the only code it had was for misfire, nothing else, so that seems promising as well.
Just want to confirm again, that with the aftermarket parts I have (listed in the OP) I shouldn’t have to have a tune right? Previous owner claims to have uninstalled the tune. Is there anything that could have gotten messed up in that process that would cause issues? If I don’t care to tune it at the moment, should I still invest in the Cobb AP? and why?
Thanks again guys. This community has been awesome thus far and I’m hoping some day I can return the favor and contribute like you’ve all done for me. Cheers!