i have a 2007 tdci manual with 53,000. about 6 months ago it dropped into limp home mode and the engine mgmt light came on. 9at a gentle cruise of 2250rpm on M3. i re started the car but the problem repeated. my local garage replaced injector 3. cleaned fuel filter. flushed out fuel tank. still same problem. electronic engineer cleaned pipes to turbo (i think) bit sooted. still the same problem. any thoughts. help. guidance. anything. i have spent hundreds not resolving a problem. am concerned about going to another garage/engineer and getting no where (well poorer!) vehicle is essentially unsafe. all help gratefully recvd. i have read about 45min blast at 4000rpm+ in fourth gear? many many thanks
