I know this is a truck site but I could really use some help with another GM vehicle. I have a 2000 Pontiac Trans Am that I am trying to get back on the road after it has been sitting up for around 6 years. We replaced the plugs and fuel filter and drained out some old gas (and of course oil change). When you start it up it will run for a few seconds before it starts to shake and cute off. Pressing the gas makes it cut off faster, also no matter how much fuel I put it it still reads empty. Any thoughts? fuel pump perhaps?