Blow of valve causing issues

[notNA]

well recently I decided to go purchase an aftermarket blow of valve, i went for the GFB Respons TMS
http://www.gfb.com.au/products/blow-...lve-bov-detail

After installing it I did the general stationary check stepping on the gas building boost then letting off to see if the car stalls with the default spring setting which it didn't.

I drove it to work and noticed when letting off the gas after building a bit of boost the car is a bit jerky and not as smooth as it uses to be, I went ahead and loosened the spring to hopefully smooth it out which I had no luck.

long story short I think i don't have it set up correctly or its just in my head and i never noticed it before.

let me know if I'm being stupid or didn't set it up correctly and yes I put it in the correct way.

doesn't matter if it vents to atmosphere or recirculates does the same thing.

[notNA]

mods feel free to move the post i think i put it in the wrong section...