I went through all of the sensor changes, IAC, MAP, EGR Valve plus EGR Relay, engine temp sensor and O2 Sensor. I finally found my best results came from backing off the throttle positive idle stop. It was set too high which did not allow the IAC and other sensors to adjust for the proper fuel/air mixture. A V-6 will never idle as smoothe as a V-8 because of the firing order, especially when cold, but I have finally achieved a satisfactory level after the engine warms up to operating temperature - it runs great.
freedom5
freedom5