We have a 2006 mondeo zetec TDci, diagnosed with waste gate problem, which causes power loss, if you have any info, diagrams etc I would be very grateful, Thanks Tony.

I did not think the TDCI 130 (2006) had a waste gate, but had a VNT (variable nozzle turbo/ variable vane turbo), and only some of the earlier Mondeo TDCI 115s had wastegates (and fixed vane turbos)

If it is a VNT, it does not have a wastegate, the variable vanes act as a wastegate, and it will have a pnumatic or electronic actuator

if it has an electronic actuator, you will see a black box sticking out of the turbo at the back of the engine, if it is pnumatic, you will see a silver metal can, (both with the engine cover on)