I have a gt-four, bought it about a month ago, from a pair of weeks i started to "feel it", and i discover not nice things...
During acceleration, if the gas is half opened, the engine gives not a "linear" response, it sims as "stopping" for less than a second, i can't explain very well, sims as it "jumping"(very very quitely!)...
If a normal progressive acceleration is this

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my car acceleration is like this

------"----------"-----"-----------

the rpm goes up with some gap......
what's the problem???
i asked to a mechanic (specialized in Lancia Delta....but at least he knows about turbos!) and he says that regulating the turbo pressure and the petrol pressure the problem should be resolved.

Anyone have this problem?