Ford fiesta 1.4 2011 plate manual - slow accerlation - fusionx212

Hi, I have ford fiesta and I bought it from 16k miles but I've noticed recently It's quite sluggish while accelerating.I have also noticed it sometimes cuts out the accelartion for a split second like it wont accelerate but then it kicks back it's very minor and rare this happens.

i read somewhere it could be to the dual clutch i have booked in with the dealer as i have some warranty left. however I wanted a bit more information. I am not really a car person but I have an idea of how things work etc.

is this a common issue and is it easily fixable or is a costly problem?

Edited by fusionx212 on 13/04/2016 at 17:12