ISX cm2350 low. power/poor. Fuel milage.

[Rawze]

(02-26-2025 )DPS567180 Wrote:  

(02-26-2025 )SquareOne Wrote:  Man, there are much more qualified eyes than mine who will be commenting soon, but that RPM vs Acc position jumps out at me.... These engines do not like to be lugged (basically high boost and low rpm (as in 1350 or less). I think the highest I'd seen was around 1580rpm. Most of the time it appeared to be WOT as low as 1115 to about 1450ish.

When we're running our trucks, we keep boost low and rpm high....1500+ unless there is minimal load. This will certainly help with longevity and mpg. Not saying it's the cause of you issue you may have, but it's certainly a start.


This is some parameters noticed in your vid others will be searching for at WOT...

CBL_Fuel_State - 47
_Engine_Speed - 1245
Total_Fueling - 267.97mg/stroke
CBR_Chi_Mode_Status - 0020
CBR_Chi_Table_Mask - 00000006
VGT_Actuator_Position - 43%

At least you understand some of it I have no idea what I'm looking at for the most part. Lol would it be the programming that will cause that issue? I've never changed anything except for the speed limiter on this thing. As far as I know this is the stock programming.

== the engine is being lugged below 1500 rpm. it cannot make full power like that no matter what you do.

== fuel state 47 = its giving you full power output for the engine mode that it is in, and nothing is holding it back.

i.e.> CT is not reporting anything other than the engine being lugged under 1500 rpm where it is completely unable to make full power.

also make sure the egr valve is not hanging open.