I have a problem with number 3 injector. Could anybody help me to identify which injector this is or indeed what is the numbering method for all the cylinders/injectors on a TDV8 engine?

Ronnie are you using a diag machine to see the live values of the injector and know its leaking or blocked?? FFRR MY06 facelift With TDV8 Alloys Zeros/ATR's
Mantec Sump Guard, Rigid Load liner, MY10 BT upgrade.

Yes, my son has a SO one and has picked up a fault on injector 3 (low pressure).
I thought I had a problem as after starting the car and holding the car on the foot brake whilst checking the road for all clear, I could feel the car 'Tugging' on the brake. Subsequently I spotted whitish smoke coming from the n/s tailpipe whilst the engine was 'missing'. He's going to do the job today, but unless anyone knows how the injectors are numbered its going to be a case of pulling a connector off the suspected injector and have a look at the code reader to see if we have guessed the right one!

I think that will be the quickest as long as you can clear the fault codes although pulling it off shouldn't make it idle any worse as I bet its like mine and lumpy enough to shake the engine  FFRR MY06 facelift With TDV8 Alloys Zeros/ATR's
Mantec Sump Guard, Rigid Load liner, MY10 BT upgrade.

It won't be fast enough for todays job, but try this next time you need any info.

http://www.fullfatrr.com/forum/topic17554.html MY 2010 5.0 SC Galway green and sand interior!!
Have the Faultmate MSV2 Extreme to be tinkering with the settings etc. !!