Non starter
 

I've been away for a few months and before I went my Silvia was running ok one day and the next it refused to start. Over the past 8 days when I've had time I've checked everything fuel and fuel pressure, I have four good sparks, I've changed the injectors, the MAF, put on a new coil and reset the timing and the bugger still won't start and I've run out of ideas so any ideas are welcome.
I may not reply for a few weeks or so as I have to go away again for work next week so I'll thank all who reply in advance.

Is the fuel pump priming when you turn it on??? If so and you have a spark could be flooding the plugs. Try taking out the fuel pump fuse and clearing it then replacing it

Tried that as well but as there was a long enough period of time for the fuel to evaporate when trying to start plus when trying to start it if it hasn't fired after a couple of seconds I've not continued to try, as I said it was running one day and wouldn't start the next I don't think this is the problem.