Howdy. I have a 2012 Chevy Malibu, 169k, 2.4 liter....i noticed yesterday that when I go to accelerate my car takes a moment to figure out what I’m trying to make it do. When I hit 20mph it jerks. When I come to a stop it jerks continuously. Even when I put it in neutral the car vibrates. I thought maybe my fuel system just needed to be cleaned so I bought fuel injector cleaner and did put that in. It seems to have helped the intensity of the jerking but has not fixed the issue.