Exact same issue as this guy here https://www.fiatforum.com/grande-punto/260637-jerky-engine.html?p=4197591

The rear engine mount has been replaced and it still seems to be having the same problem, was wondering what could be the cause?

(1.4 Active Sport)

I have the same problem, I have had a new gearbox mount fitted but it is still bad. I have brought the other two engine mounts and I am going to have them fitted in a couple of weeks time, I will let you know if there is any improvement.

I've read online that it maybe something to do with the throttle body getting dirty, but im not 100% sure. I'll give cleaning the throttle body a go, and tell you if it's any better.