Possible Fuel Leak?

[Ivan141]

What type of management does your car have? MAP or AFM? The AFM versions have an 02 sensor that might cause problems, so if you have one it's a possibility. AFM's can also go bad, but that's pretty rare.
If your engine lacks power then you most likely have some problems under the bonnet. Real fuel leaks tend to have a prominent smell..
Check under the car for wet spots/petrol smell, if you find none then do a readout of the diagnosis system. You never know, an error code might point you in the right direction (although it often spits out the TPS error code when something else is wrong).
Is your watertemp sensor connected and working properly?