Its probably a different problem but i experienced something similar to this..
I got a sort of stuttering in second and third gears, mostly at the point when i was about to shift up a gear....the engine would sorta shoomshoomshoom constantly....
Mines a 1.2 8v.....but it was annoying.....i took it back to the dealer who clocked up 72 miles trying to resolve the prob.....in the end someones wife at the dealers drove it and noticed what i was on about....so they replaced the lambda probe, and it kinda sorted the prob.
The only difference i noticed was the rev needle now sits just under the 10 mark when idle....and it used to sit just above the 10 mark...
BUT now im getting it again.....this time when im doing about 30 in fourth gear.....hmm
Dunno if this helps....