oil pressure and idle module

[tblank@teleport.com (Ted Blank)]

It seems like everytime my car (875KCSTQ with 96k miles) comes back from my
regular (or maybe my former) shop it has a new problem that it didn't have
when it went in.  This time it went in for new belts and a CV boot and to
diagnose a high, sometimes pulsing idle.  Came out with an intermittent oil
warning.

The shop decided that the idle control module needed replacing, but didn't
do it because of cost.

My question is what might they have screwed up (probably while diagnosing
the idle problem) that might cause the oil warning?  The warning only comes
on when engine is warm and then when I come down from highway speed.  Most
often as I slow to a stop, especially while making a turn.

Changed the oil 3k miles ago and filled with Mobil 1.  The level on the
dipstick is full.  The alarm goes out after just a few seconds.

I'd also like to do the idle control moduse but I'm not certain which 'black
box' it is.  Behind the access panel under the left end of the instrument
panel are several relays etc.  Without a manual, I can't tel which is which.
It looks roughly like this:


  _____  _____  _____  _____  _____  _____
  |   |  |   |  |   |  |   |  |   |  |   |
  |___|  |___|  |___|  |___|  |___|  |___|

  ___________________         _____  
  |                 |         |   |
  |_________________|         |___|
           /\
    part # 443907393P  I think this is the idle control mod.  What do the
others control.  Could futsing with any of these effect the oil warning signal?

I appreciate any help and insight

Thanks,
Ted Blank