If the temps reach 525 or better and the inlet temp to the DPF stalls around 800 or is very very slow to reach 1000+ then something is wrong with the injector or DOC.
If the system doesn't reach this then something is wrong with engine, not the DOC or injector. Once the system reaches 525 or better then the doser starts to inject fuel to get the really high temps.
This is actually done by the turbo vanes closing, causing high exhaust back pressure and load on the engine. Once a regen is initiated the DOC inlet and DPF inlet need to reach about 525 -550 degrees. When running a regen you need to open up data monitor and watch all the exhaust temps and doser injector state. Also, is the DOC and DPF due for cleaning? It sounds like you have access to Insite. Cummins does have requirements to remove and clean the doser injectors because they do get plugged up rather easily. Weak metering actuators and warped diffuser plate in the turbo are common problems that get worse with hot engines versus warm or cold engines. I know it is easier said than done, sorry. This is where you need to reproduce the situation that is causing the fault. The reason for this is not always the same. Once the truck has sat for 8 hours and the regen retried it takes off and performs a perfect regen. I have had several regens fail with a fully hot engine and exhaust systems. You would have to try a regen with the truck freshly back from a long run and see what happens. It is quite common for us to follow the TS and perform a regen and everything is fine because we started with an engine that hasn't been running for hours and has cooled down. Most regen faults get logged after a failed regen, when the engine and everything else is right up to operating temp and has been there for hours.
I see those temps all the time on successful regens. to me better then chrome! Just food for thought.The temps you have listed probably will never cause a fault. Just saying there might be a market for them. (i have thought about modifying a jeep or one already on the market) It seems like it could tie (snap) right into the side vent between the hood and door and bolt it up top. I think a snorkel on my truck would look badass and if it is made for it, who would be the wiser? People expect my truck to have one but i do not have the resorces to make one. I am thinking that If I can NOT get one that is functional because of lack of space.then I am going to be bold and say i still want one for looks which is better then nothing. I know we are all about better performance for sure but do I dare ask - What about just making one available for LOOKS.Please don't shun me.LOL Is it basically just NOT enough room to make it actually work? Why is there NOT any snorkel available for H2's. So Air Doc, I am definitely going to be adding your system to MESSIA H2 based on everyone's opinion on H4O but this brings me to another point.
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