And I am having problems, again. After he swap I fired it up and took me a while for the car to start up, after we finally did, the car was shaking like a mofo, so we let it idle for a while. After 20 mins or so, car was still real shaky and when we wanted to move it into the garage, the car would just die. I've checked every vacum and everything is connected. What I am going to do, is to check the plugs and cables (even though I change the plugs lile 1 month ago and since then never used the cat) and see what is up. What else should I be looking for?!