[Ronin]

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.