hello, yesterday with one of the in this chip tuning is very good by recommendation I got to know him, my 607 2.2hdi automatic chipped, test drive immediately great pull and response but not maximum so something reasonable but nevertheless noticeable. The problem on the highway where I wanted to speed up illuminated engine control light/environmental protection system for the engine defective emergency program, then continued driving without power immediately parked after 15 minutes I started, Mo however, power is almost normal. Chiptuner then looked at the car error read out and is of the opinion that the pressure regulator on the Bosch high pressure pump is responsible. Since he should have the fuel pressure minimally increased /should not go into the emergency run. I should change that then everything is again good, because I also start problems from time to time but every day he said very convinced that it is the fuel pressure regulator. The small piece is so expensive 120€ :-)What I don’t understand is driving the car and speeding up in original condition, although the serial output is very sluggish, why does it now problem either this part works or not or is there an age phenomenon so that it does not meet the pressure?????