Hello, I have this problem. For the last couple weeks my car has been starting sometimes, and not others. It cranks fine, but when trying to start it acts like it will work for a 1/2 a second, then at around 1,000rpm it dies. It makes no difference if I give it gas. A few days ago I replaced the air filter, spark plugs, and fuel filter, and to no avail the problem is still there. I have been waiting for it to act up again so I can test the fuel relays and pumps, but it works when I don't want it to, and doesn't when I need it. Any help is greatly appreciated! Thanks!