CM 870 idle issue after start up

[Craag]

(03-26-2021 )Rawze Wrote:  if it has a poorly made delete program in it, it could cause the surge, but not usually rough idle. Is it still got factory programming and egr active?.. or is it deleted?. and if its deleted, by whom?

Still factory with egr which was replaced about 3 years ago. Hopefully not all sooted up I try for oil changes around every 400 hours due to low driving mileage but high PTO hours which is 4-5 hours a day on my dedicated run. Truck sits running more than going down the road, way more.