Need help volks:

    I will be driving along in my 90 GL (automatic) and sometimes  it will
just lose power, eventually sputter and die.  No amount of cajoling or
pumping the peddle will stop it.  But here is the wierd part, if you shift to
nuetral, turn the ignition off and restart it, it runs fine.  Lil' help?
thanks.  CHarlie.