Firstly, thanks to everyone for their input.
I will explain where we are now and some of my queries.
On Monday morning, fresh from the weekend I checked MBV004 on VCDS but unfortunatly the lable file was missing, this has been logged and sent to VCDS.
I scoped relative compression vs fuel injector No.1. There was no injection until I disconnected the cam sensor.
Starting to look like cam timing!
Just to check, I thought I would look at the tandam pump cranking pressure, at first I thought that this could be the issue as I expected a higher cranking pressure. Elsawin states that running at 4000rpm the pressure should be 7.5bar. But I suspect [please correct me!] that like the Isuzu 4JX1 engine, only a low pressure fuel supply is required to start it due to the fuel compression process in the injector.
However, with the cam code, the lack of injection when the cam sensor is connected and its reluctence to go on easy start, we decided to pull the covers and check the cam timing. I wasnt involved in this process as I had other work to do, but it was found that the cam timing is out by 2 teeth.
We were later told by the customer, that the cam belt had been replaced about 2 months ago,in his words 'cheaply'.
Unfortunatly, the vehicle has been sent back to the other garage for them to put right the cam timing issue so I wont get a chance to get some known good traces.
Just an after thought, I noticed that looking at the cam vs crank trace that there is a TDC cut out as well as a BDC cut out. Am i right or have I been sniffing too many fumes?
Again, many thanks to all that helped.