04 leon cupra tdi help needed

hi my brother has a 04 leon cupra tdi 150 and it has stopped boosting untill it gets to about 3000 rpm then it goes. we did a vag com on it and it has no faults at all, i have checled the actuator arm that controlls the vanes and that is free an works when you suck on the pipe so i did some logs and all seems well apart from group 11 take a look.


has anyone got any suggestions on what could be causing this? any help is good help

All ready tried maf mate I put the one off my 56 reg leon fr tdi on to try as they have same part ni and no change plus in data ligs it was reading 850 till 3000 rpm then it goes to around 1180 ill put logs up when I get in later

Ive figured it out it was one of the 3 vaccume solenoids that are on the bulkhead wasnt opperating