I had this in the diesel section but I'm not getting any answers and am now out of the country so thought I would try here...
I have a PSI-Tuning box for my 2.5tdi and have now managed to get some fitting instructions from PSI. However, they are pretty vague!
All seems quite straight forward, interconnecting board between the ECU and car, brown wire to the Negative on the battery...however, according to the instructions from PSI the black wire needs to be attached via a Scotch Lock to the upper right black wire entering the injection pump.
The pictures are not that clear but I assume they mean the wire I have pointed out in the attached.
[IMG] Uploaded with ImageShack.us[/IMG]
There is then a switch wire (not needed) and a thin grey wire of which I have no idea...
Could anyone confirm I have the right wire on the pump and whether or not I need to worry about the grey wire.
TBH I would rather some advice so as not to wreck my pump.
(adamss24 kindly offered to fit this but I was pushed for time to get to him. Thank you though)