CV axle problem

[lroc06]

I have a Monte Carlo LS 3.1. I had the lower control arm on the passenger side replaced and a couple of days ago, I was turning into my apartments and all of a sudden my car made a jump and it wouldn't move. I got and I saw that my wheel was practically off, I mean the side of my car and my wheel, made a T shape, with the top of the t being the wheel. Thats what it looks like. Also, the bolt from the lower arm was missing so that's how it came out of place and my cv joint came apart and the green grease was everywhere. Anyways, I jus went out to crank it for the first time since I had it towed two days ago and the car cranks but it cuts off like 2 or 3 seconds after that. What's going on? Is it b/c my car's a front wheel drive and since the front is on one wheel and the engine isn't stable, the engine can't perform? Or is it something else? But what?