Just purchased audi tt180 think I've got a problem with the turbo when I put my foot hard down the turbo seems to hold back then boost then hold back from 4000 rpm to 6500rpm I thi its been remap but don't kno for sure an somebody help I drove a 225 tt and mine left it standing thanks

 

Hi.
The air mass meter sensor is a common fault and when they fail it can give you similar symptoms. Try unplugging it and then testing the car.
The ecu will use a default mass air flow figure.

 

The where is the air mass meter sensor and will that bring on the engine management light and will I have to get it cleared thanks jason

 

If you look to the right of the engine, the rectangular airbox (filter housing) has a pipe coming off it which is part of the air mass meter. It has an electrical push on connector. It's possible but not always the case that it will bring the engine light on.

 

Tried that and cleaned it with sensor cleaner still the same anymore ideas mate how do I check hoses and how many are there to check thanks jason

 

The boost pressure sensor is also a possible cause. It measures the amount of charge pressure being generated by the turbo and informs the engine ecu. Try cleaning it.