Alternator needs replaced? on 1990 Oldsmobile 88

Year is actually a 1988.
Car will start, but dies immediately after starting, but will stay running if gas is pressed, but of course dies immediately after letting off the gas.
What sounds like the problem?

Asked by for the 1990 Oldsmobile 88
not the alternator. take it to a shop and have them check it for vaccuum leaks.

1 more answer
Not the alternator, that sounds like a fuel flow problem, maybe dirty injectors