re. Inconsistent fuel delivery

[Huw Powell]

> I think you have some unrelated things going on.
> 
> The idle problem sound like a bad idle switch - located at bottom of 
> throttle body, which needs to be removed to replace.  You should hear a 
> little click when the throttle is openes a little.  You should verify it 
> goes from closed/continuous to open with a VOM.

I agree, also clean/test the ISV if that doesn't fix it.

> The other sounds like a blown fuse, ignition switch feed or the load 
> reduction relay.  Consulting the Bently wiring diagram would key you into 
> the common failure point.  Even a bad ground could cause this.

I would highly suspect poor grounds for at least part of the electrical 
problems.  Poor grounds and crappy daisy-chained "hot" wires...  Simply 
embarking on a process of cleaning and neatening connections might make 
a few things heal.

> 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.

-- 
Huw Powell

http://www.humanspeakers.com/audi

http://www.humanthoughts.org/