CEL DPF

[JimR]

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?

I also was told that my.problem was probably bad fuel or biodiesel. They found the bad injector by doing a Run Up and Shut Down test on the injectors.

 

[todd92]

What is a run up and shut down test? I'm also looking for induction leaks.

 

[JimR]

What is a run up and shut down test? I'm also looking for induction leaks.

I was told that it checks the output of the fuel injectors. Mine didn't pass the shut down test but the Kioti Rep said that it was okay as long as the run up test was good.

 

[The Fred]

What is a run up and shut down test? I'm also looking for induction leaks.

The induction test is done with a smoke machine to test the integrity of the intake system, if it has a turbo then pressure is used. I PM'd you two days ago to see if you wanted the info as I won't post it here.

Injector tests are done with the scan tool.

 

[JimR]

The induction test is done with a smoke machine to test the integrity of the intake system, if it has a turbo then pressure is used. I PM'd you two days ago to see if you wanted the info as I won't post it here.

Injector tests are done with the scan tool.

They did my injector test using a laptop and Kioti software.

 

[Skeans1]

A quick down and dirty way to check for an out of balance injector is that cylinders exhaust temperature on the will be higher then the others. All injectors will have mechanical tips with a poppet if too much fuel is ran through the orifice in the nozzle (tip) will be enlarged causing an uneven spray pattern or worse over fueling that cylinder.

 

[todd92]

10 hours of running hard, no idling, DPF light is flashing. I park it to regen. It goes to 1500 RPM stays there, never goes to 2300, then goes back to idle with CEL on. Since the DPF was at 4% when I got it back there is no way it got to 100%+ in 10 hours unless there is something else wrong. Induction leak, over fueling injector, bad DPF differential pressure sensor. Now how to get it diagnosed?

 

[justman777]

Unfortunately, it sounds like another trip back to the dealer. I think 10 hours and it's plugged again blows the "bad fuel" argument out of the water. Something else is going on.

 

[todd92]

Update, 2nd dealer is trying and seems to know what he is doing. Obviously cleared code and forced regen got DPF back to 0%. Now instead of handing it back to me is trying to figure out why it's plugging up or reporting being being plugged up so quickly. Tried to do the run up / shut down test and it's not letting him, so he's trying to get Kioti to figure out why. He has completely dismissed fuel issues. On the hunch I might be in for a similar experience to JimR, and the fact it was struggling with the disc harrow and I have work that's not getting done I spent a week comparing specs and shopping and brought home a new Case Farmall 75A. It puls the harrow like it's not there. It's quiet, comfortable, everything seems to work smoother. Best thing is NO DPF and NO SCR. I'm not totally off of Kioti yet, the CK has been flawless, and the only issue with the NX is this one. However, the dealer network, parts supply chain and corporate support of the dealers is sorely lacking. My neighbor, who let me borrow his truck and trailer to get the 75A and is a serious, large scale farmer and has millions of dollars worth of Case equipment just chuckled when he saw me pull up with the new tractor. "I see you finally decided to get a real tractor".

 

[DieselBound]

How many hours?

I'm at 500 hrs and I've had ZERO DPF issues, no CELs. My tractor runs a regen perhaps every 50 hrs or so. I try to keep it operating 1,800+ rpm, but it sometimes gets a bit of idle time.

Have to wonder whether there's an issue with sensor circuitry/wiring. DFP flow is monitored by a pre and post sensor. I'd figure that programming would handle cases of bad sensors, but perhaps not for flaky wiring?

 

[JimR]

Update, 2nd dealer is trying and seems to know what he is doing. Obviously cleared code and forced regen got DPF back to 0%. Now instead of handing it back to me is trying to figure out why it's plugging up or reporting being being plugged up so quickly. Tried to do the run up / shut down test and it's not letting him, so he's trying to get Kioti to figure out why. He has completely dismissed fuel issues. On the hunch I might be in for a similar experience to JimR, and the fact it was struggling with the disc harrow and I have work that's not getting done I spent a week comparing specs and shopping and brought home a new Case Farmall 75A. It puls the harrow like it's not there. It's quiet, comfortable, everything seems to work smoother. Best thing is NO DPF and NO SCR. I'm not totally off of Kioti yet, the CK has been flawless, and the only issue with the NX is this one. However, the dealer network, parts supply chain and corporate support of the dealers is sorely lacking. My neighbor, who let me borrow his truck and trailer to get the 75A and is a serious, large scale farmer and has millions of dollars worth of Case equipment just chuckled when he saw me pull up with the new tractor. "I see you finally decided to get a real tractor".

I feel your pain and was told Kioti help was slow on my machine. My tractor would not load up and pull the CEL unless I had it under a load like mowing my fields which are more like a lawn and not a field. Your tractor running at 1500 was already running in limp mode and too late to do a regen. If you can catch it in time you can disconnect the balance sensor and run a manual regen. You do need to leave the hood open due to hot exhaust blowing out of the lines against the hood. I think you have a bad injector like I did. Where you say that your machine struggles to pull a plow tells me it is loading up. I now have over 50 hours on mine since I got it back and it has gone thru one regen all on it's own while I was using it. That was a first or me since buying this over 3 years ago. It would always fail an automatic regen and I would have to do a manual regen. I hope they can figure out how to do the run up and shut down test on your tractor. Mine failed the shut down test and the Kioti Rep said that it was okay.

 

[todd92]

1000 hrs, I suspect it's a bad injector just like JimR. Only way a DPF can load up so quickly is rich mixture.

 

[justman777]

Update, 2nd dealer is trying and seems to know what he is doing. Obviously cleared code and forced regen got DPF back to 0%. Now instead of handing it back to me is trying to figure out why it's plugging up or reporting being being plugged up so quickly. Tried to do the run up / shut down test and it's not letting him, so he's trying to get Kioti to figure out why. He has completely dismissed fuel issues. On the hunch I might be in for a similar experience to JimR, and the fact it was struggling with the disc harrow and I have work that's not getting done I spent a week comparing specs and shopping and brought home a new Case Farmall 75A. It puls the harrow like it's not there. It's quiet, comfortable, everything seems to work smoother. Best thing is NO DPF and NO SCR. I'm not totally off of Kioti yet, the CK has been flawless, and the only issue with the NX is this one. However, the dealer network, parts supply chain and corporate support of the dealers is sorely lacking. My neighbor, who let me borrow his truck and trailer to get the 75A and is a serious, large scale farmer and has millions of dollars worth of Case equipment just chuckled when he saw me pull up with the new tractor. "I see you finally decided to get a real tractor".

It's interesting the difference a different dealer makes. I'd go back to one that was interested in resolving my issue instead of just doing triage and sending me on my way. Shows they care about their customers, and I'd reciprocate by giving them my business.

I'm with you on the corporate support network. Kioti's North America service network is definitely on the poor side. The only thing they have to make up for it is individual dealers that care about customers. Unfortunately, finding a stellar dealer is like finding a needle in a haystack.

 

[rademamj1]

Kioti could probably double their US sales, if future buyers had trust in their dealer network for service issues. Most owners can do maintenance, but emission problems seem to confuse even the best equipped Kioti dealers, who clearly lack sufficient training. Worse yet, Corporate Kioti is deliberately evasive on engine code diagnostics, rather than being open and transparent.

Unfortunately, It took me about 3 years of Kioti tractor ownership, to learn the true state of Kioti, which is best characterized by reliable and well built tractors, purchased from caring dealers who have recieved inadequate training. Corporate Kioti appears either unaware or unconcerned about this issue.

Just ranting about Kioti, because i seriously dread the day my CEL light comes on, because I see the incredible hardship JimR and Todd92 have experienced from Kioti.

 

[JimR]

Kioti could probably double their US sales, if future buyers had trust in their dealer network for service issues. Most owners can do maintenance, but emission problems seem to confuse even the best equipped Kioti dealers, who clearly lack sufficient training. Worse yet, Corporate Kioti is deliberately evasive on engine code diagnostics, rather than being open and transparent.

Unfortunately, It took me about 3 years of Kioti tractor ownership, to learn the true state of Kioti, which is best characterized by reliable and well built tractors, purchased from caring dealers who have recieved inadequate training. Corporate Kioti appears either unaware or unconcerned about this issue.

Just ranting about Kioti, because i seriously dread the day my CEL light comes on, because I see the incredible hardship JimR and Todd92 have experienced from Kioti.

I agree with what you said here and have been a victim to it. I'm going on 45 hours since my last regeneration with no issues. I always run my tractor at 2k rpms except when mowing. It would be nice if Kioti owners had the ability to read codes and clear a CEL when it occurs. As of the other day Kioti Corporate failed to reimburse me for my warranty repair work that I incurred on my tractor. I sent in copies of all the bills and a detailed letter explaining everything that happened. Not only did the fail to reimburse me, but they didn't even respond to my request. I will be proceeding in a legal way against Kioti. They owe me almost $1600.00.

 

[LouNY]

Possibly some help full info here;
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And this is a good reader;
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[JoelD]

JimR, your experience alone would prevent me from buying a new KIOTI. I’ll keep my 2004, simple, non-emission machine for as long as possible and if I ever need to replace it I’d likely go with name brand orange or green machine. I’d be so frigging pissed off paying for warranty work! Asinine!

 

[JimR]

JimR, your experience alone would prevent me from buying a new KIOTI. I値l keep my 2004, simple, non-emission machine for as long as possible and if I ever need to replace it I壇 likely go with name brand orange or green machine. I壇 be so frigging pissed off paying for warranty work! Asinine!

I had no problem paying for the work done up front as the dealer needs to pay his workers. My problem with Kioti is not standing behind their product warranty. It is not like any of my issue had anything to do with misuse etc. This was a failed part that couldn't get diagnosed properly due to what I believe was technical supports fault.

 

[The Fred]

Talked to my dealer friend yesterday, said they just finished up a machine with similar problems but only 300 hours. It turned out to be a bad turbocharger that was allowing oil to pollute the DPF in a very short time.

Also told me tractors are moving like hotcakes, sold 29 pieces of equipment (motorized, skid steers, excavators) in April, a record for them.

CK2610s are not being made or shipped and there aren't many to be had right now. The demand is high, entry level home gardener machines, tillers, you name it.

 

[JoelD]

I had no problem paying for the work done up front as the dealer needs to pay his workers. My problem with Kioti is not standing behind their product warranty. It is not like any of my issue had anything to do with misuse etc. This was a failed part that couldn't get diagnosed properly due to what I believe was technical supports fault.

I have a huge problem with you being out cash for warranty repair. Not your responsibility to pay anyone anything for warranty repair!! Cost of doing business and justifying margins on sale of machines. Ridiculous process and I’ve never Heard Of it before your post!