Originally posted by Alec
Since it eventually starts, probably not. More inclined to say it's that DPFE someone mentioned. I don't know crap about that and the EGR system, but it's a distinct possibility.
Originally posted by MustangShane
Ok I think I might have your answer but bear with me. I had the same problem with mine. Down to the stumbling (dropping RPM) when it idled for a period of time. This was so simple I couldn't believe it. On the drivers side of the intake toward the back is the vacuum block. I had to look closely at it because there is a port on the back side closes to the intake and the plug had come off allowing a leak. This made it harder to start and caused a RPM drop on extended idle. The computer was trying to adjust for the extra air coming in after the Mass Airflow Sensor. When it starts it needs more fuel causing it to crank more when you try to start it. It worked for me check those vacuum lines.