my 2016 Lancer EX 1.6L 4-speed automatic. When driving at low speeds in traffic and pressing the brake, right as the car is about to come to a complete stop, the engine shudders and shakes as the RPM drops momentarily below normal (before recovering back to idle) additionally, when making sharp turns at very low speeds, the car shakes heavily and feels like it’s about to turn off and on very rare occasions, it has actually stalled. The spark plugs only have 12k miles on them, I have no check engine light ,the PCV valve is brand new, so I'm trying to narrow it down, I am suspecting a dirty throttle body but haven't inspected anything yet 

  Thanks in advance for the help!