CEL DPF

[bearthebruce]

I had VAG Com for my 2016 Golf R, great tool...... My understanding is the Kioti ECU is made by Delphi.

Thanks for the kind words Todd. Also thanks for letting us know you think the controller is Delphi. That likely would make it very different from what is found on VAG. I am going to begin searching to see if any have researched control modules to see who might be making them - see if their might be some common ground. Again, I don't want to offend any Admins and if this discussion needs to move elsewhere, we should make that move.

 

[todd92]

This might be of some help:

https://www.tractorbynet.com/forums/kioti-owning-operating/391748-kioti-tractor-tuning.html

 

[JimR]

I think the bigger issue is the dealer having to contact technical support to figure out how to resolve an issue. Smaller dealers may not have trained (skilled) technicians, so they have to call Kioti support every time they have an issue that isn't entirely visible....like a blown tire, oil change, or broke window. I was dealing with my dealer on my suction side air leak (nope, still not resolved) and the dealer had to call Kioti support to see what the recommend solution was. The response was underwhelming, and went something like "Sounds like you have a suction side air leak. Recommend inspecting and repair." If that's the extent of Kioti support, it's a wonder anything gets fixed.

That is exactly what caused me to have to drop off my tractor 3 different times to be fixed for a bad fuel injector that was plugging up the DPF and Kioti said that it wasn't bad enough to cause the problem. Almost 4 months without my tractor which I used for under 3 hours during that time and was charged over $2k for the work. To which Kioti reimbursed me for $573.00. I have since written them demanding the balance or else. They have until May 15th to refund me what I paid out of pocket. After that the Court will decide this issue. My patience has run out after that ordeal and lack of technical support.

 

[rademamj1]

JimR: From your posts and comments, we all know your situation with the fuel injector problem. That a fuel injector was delivering 150% of required fuel, which overwhelmed the emissions system and fully plugged the DPF.

I was talking with a Kubota dealer last week, and just like Kioti, they also use a laptop for complete engine diagnostics, view system control settings and can even do a forced regen from the laptop. They can determine the amount of fuel each cylinder receives, and even override and adjust the fuel accordingly.

Is it possible, that somewhere a Kioti technician accidentally and without knowing it, adjusted the fuel injection level to 150% thus creating the problems you experienced with your DPF emissions system. These laptops can be dangerous in the hands of a poorly trained technician.

 

[JimR]

JimR: From your posts and comments, we all know your situation with the fuel injector problem. That a fuel injector was delivering 150% of required fuel, which overwhelmed the emissions system and fully plugged the DPF.

I was talking with a Kubota dealer last week, and just like Kioti, they also use a laptop for complete engine diagnostics, view system control settings and can even do a forced regen from the laptop. They can determine the amount of fuel each cylinder receives, and even override and adjust the fuel accordingly.

Is it possible, that somewhere a Kioti technician accidentally and without knowing it, adjusted the fuel injection level to 150% thus creating the problems you experienced with your DPF emissions system. These laptops can be dangerous in the hands of a poorly trained technician.

Prior to those DPF clogging issues my tractor ran awesome except for the bad throttle lever switch. After that switch was changed I put another 70 or so trouble-free hours on it before the Regen issues started. They never checked the injectors until my third trip out there for the same problem with another multiple failed regens and the CEL on. The mechanic did a Run Up and Shut down test on my tractor which showed that one injector was super rich. I don't believe that any settings were messed with because they did replace that injector.

 

[The Fred]

Everything you need to know is in the workshop manual, blink codes with descriptions and work throughs.

Since ECM talks in CAN on pins 4 and 16 I would think a code reader might at least pull a code number for you.

There's also a bulletin on how to diagnose the DPF. It's called How_to_diagnose_or_resolve_the_Prematurely_clogged_DPF_Problem

 

[JimR]

Everything you need to know is in the workshop manual, blink codes with descriptions and work throughs.

Since ECM talks in CAN on pins 4 and 16 I would think a code reader might at least pull a code number for you.

There's also a bulletin on how to diagnose the DPF. It's called How_to_diagnose_or_resolve_the_Prematurely_clogged_DPF_Problem

A standard code reader won't pull the codes. It would be nice if it could.

 

[The Fred]

I don't have a Kioti with an ECU but my neighbor does, I have 2 toolboxes full of laptops and scan tools I'd love to try and see what my junk would do.

 

[JimR]

I don't have a Kioti with an ECU but my neighbor does, I have 2 toolboxes full of laptops and scan tools I'd love to try and see what my junk would do.

Who is going to give you what your tractor is worth if it has issues?

 

[todd92]

Got the tractor back today. Same issue as a year ago, DPF 200% clogged hence the CEL and limp mode. Now reading 4%. It never read that low after the forced regen a year ago, so the pressure washing worked. However, the dealer claims DPF cannot be washed because it's different, unlike an OTR truck DPF it has a heater in it and washing it will ruin it. LOL. They also claim it's plugging up because I'm using bad fuel. The same bad fuel that is causing zero issues in a Kubota skid steer and another Kioti tractor. This tractor gets used in the winter solely for grapple work. The problem has happened 2 springs in a row as soon as we start using it hard again. This winter we did manual regens to try to prevent it but it happened anyway. Something else is going on. I'm putting the higher temp thermostat in it. Jim R, exactly how did they eventually diagnose your bad injector?