1990 3.1L Stalls Intermittantly

I have a 1990 camero with a 3.1L. It sometimes stalls after startup, but sometimes it stalls while going down the road. I can only make it short distances. Here is my laundry list of things checked or replaced. I have checked the fuel pressure, new fuel filter, cleaned EGR valve. I've checked IAC, TPS, and map sensors... All are good. It also has a new ECM. The car does not show any codes.
Has anyone had this problem, or have any ideas what to do next?


Thanks for any help!

May have an intermittent electrical problem. Does it misfire before stalling or just dies. If it misfires it may be a fuel problem, like the pump losing power. If it just dies, most likely it is in the ignition. Start wiggling switches, wires, connectors, etc., & try to bring the trouble in.

It will sometimes run rough. I wouldn't consider it a misfire. More like a running rich condition. I was kinda leaning towards an electrical problem.  grounding issue ect...  ????  I don't know?
 
Thanks
 
Gabe