lack of power

thanks for the thoughts of the autobox brake but i've just replaced the box and it's still got the same symtems
I replaced the lift pump,cleaned out the sedimenter,tried the clear plastic pipe ,replaced the leak off lines and checked and cleaned through the fuel lines from the sender unit

so car ran ok before a starting issue and became apparent after changing some parts ?have yoyu got lift pump piped the correct way ,rear banjo bolt in injection pump has the pin hole not larger hole as front banjo

yes the car ran ok before I sorted the cold start so I thought it was something i did and chased my tail for so long then gave up and let the professionals at team valley landrover and les potts have a go and they both gave me it back saying they did not know whats wrong
It stats ok and runs fine standing still revs up no problem but when I try to drive it it's dangerously slow to pick up and will not pull out of a rut in front of my garage unless I select low box