I honestly don’t remember seeing advice for possibly the throttle body. I’ll check the IAC tubes too.
Forgot to mention even with newer plugs the second mechanic said they’re showing that it’s running super lean, and it’s worse in the front cylinder.
Did the IAC and TPS resets, and I don’t see any change. It actually idles roughly, and if you had it up harshly, when it comes back down it’ll big out even after getting to running temp while sitting in neutral. Does the same thing after the reset. If any of this helps.