Nige_RS4 wrote:If you log block 115 you will see both requested & actual boost values - you should be OK as long as your not running more than 1.5bar peak max. I would suggest you AMD valves need servicing if they haven't been touched for 3 years. Diverter vales = bypass valves = BPV = dump valves (which in the case of the S4/RS4 is technically incorrect).
HTH
Cheers I will give that a go. I am not sure what max boost is reading as it goes off the gauge

, will check what the gauge goes up to when i get home this evening. I will check with Mik to see if the bypass valves have ever been serviced. I know the car passed a healthcheck at MRC only a few weeks ago so I would have thought they would have picked up any issues then?