CM2250 Poor fuel mileage

[Truckdriven]

(02-11-2022 )Rawze Wrote:  that is not a derate, but a common code to see. Code 47 means that the engine mode fuel limiter is active for whatever engine mode it is running in. I.E.> it has reached its max allowed power for that particular engine mode.

how many mg/stroke and what engine mode is being applied when that code is showing?.

mg/stroke Can be monitored by watching 'Total_fueling'

and active engine mode can be seen via 'CBR_Chi_Table_Mask' and 'Chi_Mode_Status'.

turbo position can be seen at '_VGT_Actuator_Position'

At 1612 rpm 100% throttle I have
_Intsantaneous_percent_load~ 91.016
Total_fueling~ 264.16 m/g stroke
_VGT_Actuator_Position~ 22.09
_exhaust_pressure2~ 383.55
CBR_Base_Chi_Low_Index and CBR_Base_Chi_High_Index always stays at 4