Thanks Ed I have access to a snap on modus which I will be taking with me if and when I get to go looking. Still not sold my nissan yet. The modus allows real time diagnostics and also stored codes ect. Good advice though. I do now have reserves about the V10's, far too many with engine 'tick' should be cheap easy fix ect ect that leads to complete motor rebuilds. Maybe it's one to avoid lol.