I don't think there's much in the way of clever electronics on the 81 280. Despite your info and the other postings I suspect either a big air leak somewhere on the intake, or a clogged fuel filter or duff fuel pump.
You say you checked the pump? These can fail intermittently. If it's at all noisy, I'd replace it.
Last edited by neileg; 11-20-2002 at 10:23 AM.