Snapper,
You are correct only TD5's need coding, TD4's are plug and play impossible to code.
One other point guys, by disconnecting these injectors whilst the vehicle is runnng you can cause a lot of problems ie. damage the injectors or possible the ECM. The injectors contain piezo electric crystals which are energized by the ECM to open and close them at a much faster rate than mechanical ones. This allows the ECM to control the pre and main injection duration periods. On an oscilloscope voltages can be seen in excess of 100 volts, if you unplug the injector while engine is running this voltage has no where to go except back to the ECM.
Just a point I thought you should know, if anyone would like a picture of these let me know.
Nige
