Pete
Some terminology, Mitsubishi refers to the Diesel Particulate Filter as DPF, and Diesel Exhaust Fluid as DEF.
At higher altitudes it’s possible that a DPF regeneration cycle will timeout and not complete due to insufficient air to complete the burn cycle. The FG has a manual DPF regeneration switch on the dash. You might consider the strategy of parking up and forcing a regeneration cycle before and after doing high altitude driving.
Since the DPF and SCR serve as the vehicle’s muffler removing them will be problematic. A couple of straight pieces of pipe won’t work as a replacement. You might consider a DPF replacement that is serviceable. There are companies that make them.
Regarding higher sulfur fuel, there’s different levels. Try to burn the lowest you can source. Keep in mind you’re running a CRD engine and everything that goes with it. The OEM water separator and fuel filter are adequate in protecting the fuel system regarding water and particulate matter. But nothing will stop the adventure quicker than diesel fuel contaminated with other fluids such as gasoline.
The DPF is more robust than many give it credit. What does them in is using engine oil that doesn’t meet Low Ash Specification CJ-4. During the regeneration cycle, the trapped soot, which is carbon, is converted to carbon dioxide (CO2). Many think that after the soot is burned off during regeneration ash is left. That’s not correct. It’s important to understand that there is no residue left behind from the regeneration operation. The ash comes from additives in the oil burnt during the combustion process.
Regarding DEF, using Amazon and DHL you may be able to set up mail drops to keep the adventure rolling, sorry no pun intended. What’s needed is DEF that can be sourced in a granular form and then mixed with deionized water. I think we talked about this in the past. DEF consumption with ULSD should be running between 2-3%, 2-3 gallons for every 100 gallons of diesel fuel consumed. As the fuel sulfur content increases so will the DEF consumption as the SCR system try’s to reduce the NOX emissions by injecting more DEF. Your DEF consumption can double, there may be a limit built into Mitsubishi’s algorithm. The system may fault out with a DEF quality fault since the NOX emission isn’t going down.
Being a 2015, diagnosis codes, fault codes, can be displayed using the multi- information display in the meter cluster. There are two types of diagnosis codes, current codes and past codes. Turn the starter switch to ON, then press the SELECT, MODE and SET/RES switches simultaneously. The multi-informational display in the meter cluster will enter the diagnosis mode.
How’s the Duonic transmission working out?
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