Renault Kangoo 1.5 jumpy acceleration

Hi guys, another problem from the van

Whilst accelerating it doesn't do it smooth, it feels sort of kangaroo style, not massively but you can feel it at low revs, when you put your foot down she pulls like mad and you cant feel the sort of hesitation.

Any ideas?

Thanks
Ian

Renault Kangoo 1.5 jumpy acceleration