Hi mate
Just had exactly the same problem as you,front figure eight creaking LOUDLY

,if theres no movement you can cure this by piercing a very small hole in the top of the camber arm gaiter/rubber bush cover & insert the spray straw of a can of penetrant fluid in & give it a good squirt,it wont work immediately but after a few hours & some miles it cures it,i then sprayed in some lithium grease to keep the joint lubed
A small hole tho just enough to force the straw through.
Fuel cut is usually around the 1.2 bar mark mate,1.5 seems very odd where are you getting the readings from,EBC ,manual boost gauge ?