2001 S10 4.3 Vortec Blazer Surges at idle after starting when hot

[gnnova]

I have a 2001 S10 4.3 Blazer that has an issue with a surging idle after it is has been driven, shut off and allowed to set for 30-45 minutes. It has a factory cam that was used in the 94 Blazers that has more lift and duration than the cam it came with but I don't have the exact specs. It will clear up after 30 to 60 sec and idle fine. Shorter off times or longer times off after the drive is ok, although it does idle a little lean but not as lean as when it is surging. If it is started and driven, the idle VE will show it 5 to 6 % rich. This lean condition and surging is only after a restart after it is driven for 30minutes or more. I have tried increasing the Afterstart Friction and Airflow Delay's 5 to 10 cam revolutions in the effected temp range and it has helped. It seems like I am going in the wrong direction if it it is already idling lean. If someone could give me some insight on this, it would be appreciated
2001 Blazer idle sca a 6-12-25.hpl2001 Blazer criuse sca b 6-12-25.hpl2001 Blazer increased Startup PID delay time Added Cam rotations to airflow delay 6-11-25.hpt

[gnnova]

I forgot to add a scan where it was surging

2001 Blazer idle surging scan 6-3-25.hpl