Josh280z

Hello! I am working on a '78 280z that my grandmother is selling. Currently it will start, run, and drive just fine, but only if I take a vacuum line off and put some gas in the manifold. Otherwise it just cranks. It's a fuel injected car. Anything that will point me in the right direction will be greatly appreciated. As I said, It's Granny's car, so I'm not very familiar with it (even though I love Z's). Thanks!