power loss

Hello all,

I have a ford focus 2010 1,.6 dtci with the Peugeot engine,
It loses power under heavy load in third fourth and fifth gear,
It is logging P0299 Turbocharger/Supercharger "A" Underboost Condition,

I have tested the turbo and its able to produce 2.3 bar pretty well

Tested the pipe work between the vacuum control valve and the turbo which is good,

I got a vacuum control valve from the auto factor and tried that which made no improvement

On live data when I am driving the car I have graphed the map/and the afm together the both of them are responding very well together and pretty fast in relation to the throttle,so I cant really point a finger at them and say 1 of them are faulty,

I have tryied disconnecting the egr valve but the low boost code still comes back,

I have done a check on all the pipe work,And I cant hear any air leak when the car is reved up! and there are no traces of oil on or near any of the boost pressure pipes, and also the intercooler looks nice and dry too!!




I know I am missing some thing here and would be great full for any ideas u lads may have in relation to the problem,
Thanks,