NF engine cut-out

["Mark Hahn" <hahnmgh63@earthlink.net>]

  All of the sudden lately my '87 5000KSQ NF engine has started to
occaisonally cut-out at low RPM's and not particualar whether it is warm or
cold.  I say cut-out instead of miss because it is like all fuel or spark
stops not just one cyclinder.  Since it seems like a low rpm thing I'm
inclined to believe it is a fuel problem.  The engine has new plugs,
cap&rotor and wires a month ago and a new fuel and air filters about a week
ago.  I may just have to wait until it gets a little worse so I can tell for
sure it is fuel delivery and from where.  Any ideas?  Thanks, MGH