1996 Grand am just won't start
 

First off the car is a 1996 Pontiac Grand am, 2.4L. It started almost a week ago and i've been working on it every free minute since then. Basically i'm pretty sure it's the passlock system. It will start sometimes, but run horrible. Just rumbles and eventually stalls out every time if it actually starts in the first place. Does anybody got any advice about this cuz i have tried so many different things and i'm just about out of ideas. By the way, i replaced the fuel pump, filter, injectors and just cleaned the ignition cylander.