2000 chevy malibu start car but shuts right off

I have a 2000 chevy Malibu I just replaced the Egr valve and since then I can turn the car on but it shuts right off, if I keep foot on the gas it will stay on, if I unplug the pcv valve then when I turn on it will stay on but as soon as I plug in again it shuts down. I have replaced the pcv valve and still problem.:screwy:

Go back over the installation of the egr, no quick answer here, something you did triggered this issue.