86 4000S stalling after warm

["Browning David (TVCS)" <BrowningD@tce.com>]

I'm in a quandary about a problem with my 4000s (4-cyl. CIS-E)

After the motor is good and warmed up the engine will all of the sudden die
and won't restart.  After several minutes it will start and then repeat
after a few more  minutes.  It seems either like some kind of weird
vapor-lock problem or maybe not enough fuel pressure.  I put a new fuel
filter on it to no avail.  The fuel pump has always made a big racket even
when it did run.  I cleaned out what I could of the fuel distributor, but no
luck.  

Any ideas would be appreciated.  

David B.

'86 4000s