I towed it to a neighborhood mechanic to have a look at it. He came by first and checked to make sure there was spark and checked all the fuses. He said he thinks it's the fuel pump and he's going to check it at his house in a couple of hours. He said there should be a noise of the fuel pump filling up or something when you turn the key, but it's not happening. I'm a bit worried though. Sounds like he's going to want to change the fuel pump, which looks like it runs for at least $200, but then in still may not work if it's just one of these relays, CPS or EPU. I don't know enough about volvo's to figure out if it's any of those other things and I'm not sure he does either. Is there any way to rule out the fuel pump before spending all the time and money to replace it? Can't really afford a professional mechanic at the moment.