Fuel traces in EGR Valve.

[fixkick]

remove the ISC , clean it, and get it very clean>?
if that makes it works spray some graphite lube inside?

isc video test , after cleaned, sounds like this with 12vdc power pack. (short fast test, do not over heat coil inside , holding 12vdc there for more than seconds)
ISC video short:
http://www.fixkick.com/videos/FLV-all/showtime.html#ISC

I clean the 2 dirty parts at same time
http://www.fixkick.com/sensors/cleaning-...uble1w.JPG


http://www.fixkick.com/sensors/tests/IAC-E-tests.html

in most cases the ISC works great after cleaning it.
i might make noise, now this old, many folks would just ignore that, if idle speeds were good hot. 800 rpm , then turn on head lamps and heater blower same time, see if it holds at 800.rpm.
but noises can be a pain to hear all the time ,and is very personal choice.

Good luck finding your cars noises ! and Cheers to you.