Got my A4 2.5 TDI chipped by Upsolute. Runs fine but at about 1900rpm if i lift off gradually in gears 3-5 the engine makes a strange 'metallic' sound. Upsolute engineer cant say for definite but thinks it may be the diverter valve.
in 6th at the same revs the engine stumbles/hesitates
Neither of the above happens with the standard chip.
Does anyone have any opinions, only i was told by someone else that diesels dont have diverter valves?? [img]/ubbthreads/images/graemlins/confused.gif[/img]