I own an A4 Avant 2.5 TDI 180BHP / 132kw Multitronic 216,000km fully serviced. Recently it has developed what I would describe as a lag between receiving an acceleration order and accelerating correctly, happens mainly in slow town driving i.e starting and stopping, but also when trying ¨kickdown¨. The symptom is a gradual acceleration with revs going up but the turbo doesn't kick in until it's overdue. As if the engine is holding it's breath. Any suggestions? I have an appointment for Wednesday afternoon in my Audi dealer, however he maintains that if nothing shows up on the Diagnostic computer, it may be quite tricky.????

 

Have you performed a throttle body adaptation?