I have a very strange bug from what I have been researching. When I go up with a player to a car, the ping starts going up to 200 making it unplayable. I am on a MP server and it is a well hosted server, I have a good PC and good internet connection.
I checked with a friend that mine is a strange case. Once we got into the same car, which was being driven by another person, he was doing perfectly fine and mine was horrible.