2010 INT. Durastar maxxforce DT wont do DPF regin

Does it give you any codes at the moment?? Have you changed any parts emissions related already??

 

I replied to your pm.

 

International has a really good diagnostic manual for symptom based aftertreatment issues. It starts out with a system diagnostic troubleshooting tree that runs through the entire system, even gives you sample graphs of what your signal values should look like. To go any further you'd need access to a scan tool, NED/Servicemaxx, and the diagnostic manual. Your local International shop should have all of that. They are being lazy/ incompetent if they are just throwing parts at it. Ask them if they have access to International master service information, if they don't find a shop that does. No repairs should be done unless there is a clear justification, either the troubleshooting tree or International told them to. If they want to replace the HPOP, ask them to provide the values for ICP vs ICP Desired, what the IPR duty cycle was, etc etc. If you had any issue with the HPOP there would almost certainly be a code for it. Do you have the inhibit switch on?

 

International has a solid systematic series of tests to determine if your HPOP needs replaced. This is involves using Navistar Engine Diagnostics (NED) connected up to a 4 channel oscilloscope device called a Cylinder Performance Analyzer (CPA). There is a at least four test harnesses connectors and a few changes of the inputs for each step of the test. If your HPOP is bad the program will generate a warranty code within the program (meaning pump is bad). This does not mean your pump is covered under warranty it just how the program works. So I think a careful shop wouldn't be throwing parts at it but will do systematic testing. Do that testing takes time & effort. All those test harnesses cost money & some work to connect up.