Partshelper

Car wont start, when I pres the start button, you can hear it trying to start, but it just wont start up? Any ideas on what it could be?

DiamondDave2005

Probably the battery - see if you can jumpstart it or pushstart it.

ASMspec

Maybe your small Buddy Club battery is dead or your OEM one is dead?

Partshelper

it doesnt sound like the battery is dying though. It turns fine, but wont turn over.

ASMspec

Hmmm.. Have you recently gotten any moisture/water inside your throttlebody into your intake manifold? Your turbo now right? I know that you guys just had some heavy rain also. We are not getting it up here.

SIIK2NR

If it's turning fine but not igniting...then I would check the plugs and coil packs. Oh and the obvious.....Gas..

Next would be the fuel pump, injectors

xviper

If it will crank and everything else is fine, it will start. At -38*C, my car barely cranks, but it will fire as long as it can get a couple of compression strokes in.
You must now look at ignition or fuel. Perhaps your immobilizer has stopped recognizing the key? Your symptoms seem quite similar to the fuel pump being ignored. When you put the key in and turn it to ON, do you hear the fuel pump energize?
Could it possibly be flooded due to some weird way that it was recently shut off? Does it even try to fire (like an ocassional "bark")? If so, it could be flooded, in which case, pedal to the metal as you crank.

Partshelper

I hear the fuel pump. I have a walbro in there right now. Had a few ignition problems in the past, could be that. Just changed the coil packs a few months back, so I doubt it could be that.

Slows2k

I know your car is far from stock, so listing all the mods will help in finding out what is wrong.