Power drop at 2.4T 2003

Power drop at 2.4T Last autumn I noticed for the first time that our 2.4T performance was not constant. The thrust “sucked” off again and again, especially with more pressure on the accelerator pedal/acceleration processes. The friendly said that because of a hole in the exhaust system the engine would pull false air. Then the hole was patched, error codes read out and reset made. In short it was good then it started again. So I bought a new blowout. f for EUR 480. Now it’s worse than ever before. What to do?