I have a fiat stilo 1.6 54 plate I brought it back in September this year it ran fine for a few weeks and then the problems started it struggles to pull off kangroos which causes problems when pulling out stalls constantly revs bounce up and down when ticking over and drinks fuel the on board computer tells me I'm getting 14 mpg! I had it plugged in to a diagnostics and was told clean throttle body which I done still didn't solve it had it plugged in again was told to replace 02 sensor and map sensor which I did still hasn't solved it I have also replaced spark plugs and air filter and after all of this it seems to be getting worse really Carnt afford to keep buying parts that don't solve it this close to Christmas would massively appreciate if any one had the same problems and resolved it thanks!

How is it once it gets going?
Does it pull better in higher revs? less kangarooing/ none?
Does it sputter when rolling at high speed like 150 km/h?

Does it have any errors at this time after replacing what you mentioned?

Yes it still Judders at high speed but more when slowing it will stall or not pull off and what do you mean errors lights on dashboard ?

Did i ask only one question?

First step towards stabilising your idle is to clean the inlet control valve. 'How to' guide here:

https://www.fiatforum.com/stilo-guides/83260-cleaning-your-inlet-control-valve.html

The link you just sent me is that to clean throttle body if so I've done that twice allready with no luck but thanks