violently

ever so often my rsx just start to jerk bersekrly outta no where when driving, happens like 2-3 times a week. u would be cruising then it starts to jerk. my guess is the fuel pump? any suggestions my 02 sensor is brand new as i thought that would fix the prob. I/E/Kpro are only mods done.

So the other night, I hit this massive pot hole. Since then I've noticed the car shakes really violently when coming to a halt in any gear around 2500 RPM. Not sure if maybe something came loose or I just need a re-tune. Any ideas? Thanks.