Inconsistent fuel delivery

[Matt Bliefernich]

Patient: '86 4kcsq

Symprotms:  The car began by taking a long time to start,  I thought it 
might be that fuel was draining out of the lines and needed to be pumped 
back up before it would start.  Then it began to start fine and idles fine 
when cold but once warmed up a little it begins to vary between 2K rpm and 
the normal 900 to 1k rpm.  It will maintain the high rpms until the gas is 
pumped, then it will settle down to normal for a moment and return to the 
higher rpms.  This happens while driving as well to the point that while  
accelerating you can feel it jump and settle under you.  Fuel Pressure 
regulator?  Now yesterday on the way to work the windshield wipers, windows, 
sun roof, heater blower and rear window defroster suddenly stop working.  (I 
checked all the other electronic systems and they all seem fine.)

What I have done:  I checked all the fuses and relays and when I pulled the 
Fuel Pump Relay it literally fell apart in my hands.  I got a new relay and 
now the other electronic systems are working again with these few quirks:  
Emergency flashers are on when the switch is off and off when the switch is 
on,  dash lights no longer work, intermittent wipers no longer work nor do 
they return to rest when the control is turned off.

Questions:  Could the fuel problems be the Fuel Pressure Regulator and could 
that be being caused by the electrical problems?  Any other ideas on the 
electrical problems?  Is there something I am overlooking checking out?  Any 
help would be greatly appreciated.

Matt Bliefernich
'86 4kcsq
'03 A4tq