Engine fault, help please

[MaXXeH]

000564 - Boost Pressure Regulation: Limit Exceeded (Overboost Condition)
               P0234 - 001 - Upper Limit Exceeded
             Freeze Frame:
                    Fault Status: 01100001
                    Fault Priority: 0
                    Fault Frequency: 1
                    Mileage: 63633 km
                    Time Indication: 0
                    Date: 2000.00.00
                    Time: 10:48:34

             Freeze Frame:
                    RPM: 4261 /min
                    Load: 9.0 %
                    Speed: 58.0 km/h
                    Temperature: 81.0°C
                    Temperature: 24.0°C
                    Absolute Pres.: 1000.0 mbar
                    Voltage: 14.224 V

004688 - Fuel Level too Low
               P1250 - 008 - Implausible Signal
             Freeze Frame:
                    Fault Status: 01101000
                    Fault Priority: 0
                    Fault Frequency: 1
                    Mileage: 63633 km
                    Time Indication: 0
                    Date: 2000.00.00
                    Time: 10:48:35

             Freeze Frame:
                    RPM: 4261 /min
                    Load: 9.0 %
                    Speed: 58.0 km/h
                    Temperature: 81.0°C
                    Temperature: 24.0°C
                    Absolute Pres.: 1000.0 mbar
                    Voltage: 14.224 V


I have a spare fuel pump shall I change it?  The car now sounds like it is back firing under load 

[The Doc]

Could be anything from A-Z I'd get your ass to someone you trust that knows MK5 GTI's and has the diagnostic equipment to match.

Change the pump by all means but don't hammer the car if it's running badly.

[MaXXeH]

i know them very well, and have all the kit.  Just thought i would ask befor i got my spanner out 

I might just change the thrust sensor and go from there.

I never trash my car when she is ill,   just like my other half 

[The Doc]

Cool, it's just hard to diagnose via the web 

How did you get on?