Thanks guys, haven't heard any spooky noises or anything, so i assume it is the sender. Sometimes tries to stall at idle, but i think the idle is set too low (450-500 RPM)...
I've just got my car fresh from importing, and have not had a chance to change all the fluids yet. Problem is i'm pretty useless mechanically, and all the shops are closed till at least the 6th. I'll report back when i get the fluids changed / a service and get them to look at the pressure sender.
Any recommendations of shops to get my car serviced in Melbourne? Using Evolution R, but they seem pretty $$!
-marcus