just installed a new wastegate actuator , when give full throttle the boost spikes at 0.6 bar and then settles at 0.55bar (8psi) but after a while it just starts rising very slowly.I wasn't paying attention to my boost gauge and all of a sudden I had 0.65 bar.. What's the cause of this?
If i reduce my throttle just a tiny bit it goes back to 0.55 bar and stays there.

thanks

 

Nobody that knows what's causing this?

 

Had another test today, seems that it isn't doing it all the time.. in the lower gears , 1,2,3 it seems to be ok most of the time. 4th,5th all the time. In the lower gears i mostly get 8psi holding. Sometimes i get 9.5 psi at the lower gears. Could it be leak at the amal valve pipes, amal valve not working correctly?

Little help please, thanks