Just a quick note of thanks to this forum and the contributors who set me right.
My 05 350Z has performed pretty much like a dream with only a few minor hickups fromk new; however most recently last Friday 13th, I came home as usual from work, parked up on the drive, but Saturday morning I suffered a non starting car... Turned over, a dream, and petrol pump primed a ok, bit no ignition. Cranked over strong but no spark... definitely fuel in the system and getting into the pots etc as I could smell the un burnt petrol at the tail pipes....
Spent Saturday and all day today scratching my head and wondering how I could get my car to my dealership, who I have to commend as being excellent... not sure if I can advertise here, but suffice to say they have never failed me.
So being an old school mechanic (hobbyist) I knew I was not in a position to tinker... so found this site and second message I read completely described my plight.
I selected my alternate key just in case the main had a tired battery which I think may have been contributory, and the Z fired up after a couple of attempts, a bit lumpy, but better than the last efforts over the weekend... then with the tell tale dash lights illuminated I followed the ECU reset process ... and all came good.
I hope I can help others in the same way I was helped today... thank you to "Z Veteran" whose content directly resulted in a win... Much appreciated sir.