My 90 V6 3.0 did the same thing. Unless you kept a toe on the gas pedal it would die. Culprit was a dirty Throttle Body. Removed and cleaned the throttle body problem solved. Ok...I lied I used the redneck fix of spraying the *$&# out of it with carb cleaner (had 2 hours till I had to leave on a 400mile trip to my grandmother's funeral).