Exhaust Back Pressure at Idle . Turbo boost spiking

[BrandonOlsen]

(11-29-2022 )windowrattler Wrote:  For passive regens as Rawze said, it wants to keep it 500 degrees plus. Soot burns off nicely around 1100 degrees. When you are driving around working the truck it will get that hot and burn off.

Passive regens unfortunately never burn off everything. At a certain levels of soot build up the ecm will call for an active regen. This is when the ecm will introduce fuel into the DOC to raise temps up to the 1100ish degrees to clean the DPF filter more completely.

Besides burning off soot exhaust temps for scr need to stay in a window for optimal NOx conversion. Too little temp and the conversion rate suffers and too high of a temperature and it will actually oxide the DEF and turn it into NOx. During active regens and other times of high temps it will stop dosing.

Thanks!
What should oil pressure be?
For example... Engine Coolant Temp 182. Engine Oil Temp 188. RPMS 940. Oil pressure 37