I have a 2000 monnte carlo ss 3.8l. The other day I completely filled up my tank before going to work(15gal), then parked the car in the lot while I was at work. When I went to start the car up, it sputtered and seemed as if it wasn't going to cut on. It idles hard(shakes violently back and forth) but is completely fine when driving. When i'm at a complete stop, I have to put the car in neutral to reduce the shaking. I popped the hood and saw a hose by my air intake sucked in/squeezed in (normally its filled out), and I hear like a sucking sound. Not sure if that has anything to do with it. Does anyone know what I can do to fix it? PLEASE HELPPP

 

you may just have a bad vaccume line? or sensor? try the IAC sensor or even the PCV valve. many opt for problems...