1992 3.1L V6 TBI with 160K miles.
No codes on the diagnose interface (I have the ALDL software on a laptop but nothing's out of the ordinary).
Just changed the EGR valve with a new Delphi unit, no effect - engine maintains idle until gets hot then just starts to misfire at idle until it dies.
Here is a sample audio file with engine running:
http://pc.cd/v3dctalK
I remember a post from LMP saying something about an Ignition Relay, does anybody knows where that might be located?
Any other ideas?