You get better combustion, faster more efficient burn and a dramatic reduction in soot. The KTS will bring up the next screen with particulate filter status, Engine speed, exhaust gas tempreatures and differential pressures. The problem is that nobody ever explains to the owners/drivers that there is a manual regeneration button that the driver can push to keep the truck from going into "limp mode." System goes 200 - regen start. I have in the past on extreme cases even removed the DPF from the chassis and initiated a…, I checked EGR flow. Home / isuzu npr problems. We have seen these symptom more and more on Isuzu … Posts on : November 3, 2020 / Posts by : / Uncategorized • You might be a technician that wishes to try to find referrals or resolve existing troubles. I don't have much in the way of answers or opinions. Second thing I would check would be making sure the NOx sensors aren't drifting. I get it together and try a regen. Your EGT should get close to 1000, IIRC. You’ve probably been forced to pull your truck over for a manual regeneration and possibly even experienced a severe derate rendering your truck useless and forcing a trip to the dealer. Have you run the nozzle and SCR tests? This solution is available for the entire Isuzu truck range, for bookings contact us today. Passages clear? One of the problems with DPF is that when the engineis new, the DPF is filtering pretty much only soot fromthe engine, which can then be purged through the regen process. mines 0-2% at idle. I can do the DPD delete on the 4HK, 6HK and 6UZ models, but not the Giga's. I … I have done many forced regens on these trucks, but never tried in gear. Would really like to know if they solved it, I am experiencing same problem :/ I used to get 260km burns then 1 day smoke started pouring out I fixed everything bellow smoke stopped but now regen coming at lower then before 140km 180km 200km 160km etc and very sluggish on regen, Except I just replacedNew injectorsNew egr New egr coolerNew oil coolerDpf filter ultrasonic cleaned back to NewNew suction control valveNew differential pressure sensor, Not looking good as they're talking off-road only which likely means DPF delete-, "Neerabup Diesel Services assist our clients with repairs to their DPD systems and also offer a permanent solution for offroad vehicles such as those utilised in mining and exploration applications. A forced regen occurs when soot builds up inside the diesel particulate filter (DPF) to the point that the vehicle is no longer operable. x NPR: NPR. Hi All, I have a Isuzu Npr light truck with a 3.0 four cylinder diesel engine (Didn't have the 3.0 option in database). You will need a really good OBDII scanner to read the codes and put the unit in a manual regeneration. yet we still continue to have problems. To those having trouble, what Ive read it seems that the Isuzus are set up to do a regen when the DPF reaches 70% blocked, whereas the Hinos are set up to regen at only 30%, so that if you delay a regen in an Isuzu, the DPF becomes critically blocked and the truck goes into limp home mode. It's at 800,000k now and the DPD filter had soot on the exit side so needed to be replaced. If anyone out there is an Isuzu tech and has training info they would share with me it would be appreciated. That kinda info. As I said above, it will sit at "200-regen start" forever, then sometime it will start the regen (370-regen active) then a couple times WHILE IN REGEN ACTIVE, will kick out into regen start. What i did find weird is I have 2 trucks next to each other. It sits at 200 - regen start for an hour. Posted to Asian Electrical on 8/2/2016 5 Replies. one have a slightly larger passenger load but other than that they are identical in any other aspect. Sits there awhile. I subbed for 3 days on Isuzu site and its the same info as on my scan tool, so that was a waste. When you are looking at 30 grandfor a basic diesel 4wd engine, it's not unreasonable toexpect long life. Filters x Truck Make: Isuzu. That table is to decide whether a normal or slow regen is necessary. I take out the aftertreatment injector to make sure it atomizes, and look in its hole. the other not a fault to be had. Then it would Regen. It could be a wiring problem...like a damaged loom. The DPF was manually cleaned. All it takes is a small bit of mud in the wrong place to stop the exhaust flap from operating. This is my work truck, its an Isuzu NQR chassis, engine is a 4HKI-TC. How long are you willing to wait for an outcome? But kicked out as the compressor disengaged. Thanks for the thoughts. One of the problems with DPF is that when the engine. We now have to resort to getting the dealers to do a forced burn every time now (about twice a month) and also do regular servicing with low ash, semi synthetic oil to give it a chance. After about 30 seconds the engine starts to load up. 2011 Isuzu NPR red exhaust light light, amber regen light blinking, engine derate light on, no codes, exhaust differential is at 0.02 psi. I mean like 20-warmup, 200-regen started, 220-temp rise, 370-regen active those modes. We have the isuzu software at work so if you live in the Atlanta, GA area feel free to come by and get a scan and a regen. If I take…, There is a little bit of aftertreatment added at the end. Campaign Number: 16V797000 Date Manufactured: Nov 02, 2016 Vehicles Affected: 25018 Manufacturer: Isuzu Technical Center Of America, Inc. Mfr's Report Date: Nov 02, 2016 Component: Vehicle Speed Control 2015 Isuzu Npr Vehicle Speed Control Recall 16V797000 The big problem is no one gets them cleaned.Isuzu servicing gets them sonic cleaned every 100,000kms but hardly anyone does them. I can take CAC pipes off, put pipes on, open egr, close egr, remove the cooler, nothing seems to change load. I don't know if these will perform a forced regen while in gear. I'm not a diesel guy at all, but I researched the light and all I can find is just: 'an issue with the SCR system, bring it to a dealer'. Not talking about passenger vehicles more so trucks here. There are DPF cleaning services if you search around- https://www.dpfregen.com.au/diesel-truck-dpf-cleaning-sydney/and you have to do a bit of homework on maintaining your DPF-http://www.oilem.com/dpf-cleaners-and-dpf-cleaning/and no doubt cleaning machine technology is advancing with the size of the problem. Its time this Company was held to account. Has anyone got OP email ? This can be a sign leading to a failing DPF unit or AdBlue Module. Even then one dpf will act differently to another just on dpf type alone, much like conditions its operated in, oil used, regen strategy. I felt it could be a problem in the system controlling the burns because of the 'jumping of the bars', but none of the service centres have said there is a way to reset or reboot the system – and I'm an English teacher, not a mechanic, so what would I know. It's getting a new turbocharger put in tomorrow and we'll see if that makes a difference to the regen times. is in the tool. I have a 2011 Isuzu NPR with a 5.2 MIL and REGEN illuminated, but no engine performance problems, or derate. isuzu npr problems. I've already spent 6500$ trying to fix the problem n still the engine light is on.Company(Isuzu) shouldn't be introducing this system if it's not reliable.Don't want to spend any more since no one knows what the actual solution is.Just wondering if I can disable it. :shrug: Hi Jim: It set a p0172 this afternoon. Does that raise the engine load? As I think you know, the service information, TSBs, etc. is everyone that's having problems getting the repairs done by an Isuzu dealer or just a mechanic that thinks they know what they are doing? Seems to have worked. Have you gone to Isuzu Australia over the dealers head? It relates to irregular regeneration burns in the DPD filter – sorry to be so wordy, but I type fast and you may need all the pieces to the puzzle if you want to try and solve it. My Hino has a regen button that I can push to activate a burn if I interrupted the previous burn (did it once just to see what would happen), but the truck will automatically regen anyway once you get going again.Not uncommon to regen almost everyday, and even several times per day if doing longer distances and higher load work.Mind you, it takes all of 5 minutes (literally) to do a regen. The problem is this soot, it has no-where to go and so will then begin a blockage in the DPF system and this is how common DPF Problems occur. This truck came in with a p244b - dpf high differential pressure, p2463 - dpf high soot accumulation, p2459 - dpf regen frequency. I have a 2012 npr200 which began the auto regen process as I was driving.. Among the top selling Isuzu trucks may very well be their older model trucks that continue to have a lot of life left in them for the right commercial enterprises. To those having trouble, what Ive read it seems that the Isuzus are set up to do a regen when the DPF reaches 70% blocked, whereas the Hinos are set up to regen at only 30%, so that if you delay a regen in an Isuzu, the DPF becomes critically blocked and the truck goes into limp home mode.My question is, can you manually regen the DPF before it reaches the 70% mark? The next Isuzu specialists ran a heap of tests and said the injectors tested fine (they were replaced some time back by this service centre) but perhaps the turbocharger was a problem and it was producing a lot of soot which made for irregular burns. EGT gets to about 800*, it goes BACK to 200-regen start and sits there half an hour, then kicks out and sets a P244C - too long in regen. I have this 2012 NPR, Im calling out more professionals for assistance, seeing as many of my die hards have left the mothership and came here. I will from the rather old info on this page research & try & get a solution to the problem. I have a 2012 npr200 which began the auto regen process as I was driving.. Got a Raytek? As I mentioned earlier, this should be in the service information in the tool. It had been burning at the 300km mark for every burn (the maximum it will go before burning, indicating it may not have been functioning properly and was just defaulting to the maximum kilometre burn rather than burning when necessary). Your Isuzu NPR uses cooling chambers in the engine to cool the engine and prevent its internal components from seizing. None of the…, FWIW, mine would not got hot enough to start regen. I have two FTS800's that have been converted to 4X4 buses. The irregular burns continued. actually it'll be a complex mix of lubricant additives, wear metals and other non-combustible material. Can anyone look at this problem and offer suggestions? When the cooling system is not working properly, the engine may end up overheating. The funny thing is the truck doesn't even go into temp rise. All well and good to do a delete until it gets a love note from the RMS for a pit and emissions inspecton, Hello, just wondering if you found out the cause of problem as this is happening to us now. Not very…, Hi Jim: There are 2 complaints filed for the 2008 ISUZU NPR. I was talking to a friend last night who works for Ryder and he said if it goes in and out of regen mode it needs injectors. That is in service information. Even something like a loose terminal pin causing high resistance and causing a bad reading as wel. we have had the EGR valve cleaned and replaced. Im out of ideas, Does this one have the exhaust brake by the DPF? This parameter displays the engine load in percent based on inputs to the ECM from various engine sensors. The soot on the other side of the filter can be caused be a build up of ash in the filer and while a regen is carried out can cause a hot spot in the filter and crack causing soot to leak past. GO TO THE LOCAL AUTOPART STORE, BUT NOTHING IS AVAILABLE. Even then one dpf will act differently to another just on dpf type alone, much like conditions its operated in, oil used, regen strategy. HTH, Our users can find data on mass market car models from most popular brands. The agents have relieved me of $1,300 (approx) for supposedly sorting the problem without success & cannot give me a definite solution. This will make its way into the engine and cause the same issue after the repair. We specialize in Isuzu NPR, NQR, NRR, FRR, FTR, and FVR, Mitsubishi FUSO, Nissan UD and GMC W3500, GMC W4500, and GMC W5500 used Trucks and Parts. If i turned all accessories on, including ac, it regened. Most dealerships have diagnostic tools with which they can test your truck's DPF status, and check PM levels. It does make fire now, but it doesn't always go into the regen. The owner has been having problem with the dpf regeneration taking a very long time or not being able to compltete. I see nothing changing when it…, Hi Jim: i cant see emails because im only new here. New info. I would download it, just in case Scott has to pull it. I step back and punt a DOC in it. We tried disconnecting the battery overnight and the next day it went to a 280k burn with the bars behaving normally, then went back to the 'jumping bars' and burning irregularly. They're checking the wiring out at the same time but feel the turbocharger could be interfering with everything else. Isuzu truck DPD regen problems - can anyone help? The dpd system can be easy to diagnoses or very hard to diagnoses with new issues rearing there ugly head with high km trucks . Woah. EGR only works at low revs and cold starts but how would you like a tube out your ass back into your mouth? Need help figuring it out. Meanwhile, my hubby is having a nervous breakdown because he's worried it will stop in the worst place, as is often the way when something goes wrong (the first DPD filter stopped the truck without warning near the 400,000k mark and it had to be towed), or that he'll spend the money on injectors and turbocharger and the problem will continue. But when it DOES go regen active, that value isn't any different. I did have a p0172 code set twice, which I cant prove out. Thanks for the reply. Like its waiting for something. but how would you like a tube out your ass back into your mouth?
Hey Jon we have a resident mechanic by the name greasytshirt. The biggest struggle I have had with forced regens on these is getting them hot enough to start. This is even more unhelpful and this thread (among others) is why I bought a Hino. Too true but apparently the OP's truck is saving the planet according to the brains trust that know all about these matters.You are not alone OP and help is at hand it seems-http://www.neerabupdiesel.com.au/news/isuzu-dpd-dpf-problemshttp://www.goldfieldsmc.com.au/Files/Other/Isuzu%20DPD%20Repair.pdfalthough I suspect it's strictly for off road use, on the farm, etc you understand ;)https://chiptuning.com.au/we-cracked-the-code-on-isuzu-npr-nps-f-series-for-dpf-off/. Thanks for the two sensible replies. Then it will continue to start and stop regen on its own…, Gotta love this, from Isuzu training... So I take out the get the egt hot, I pull over at 600* and try the regen. Each other a tiny hole in about 1/4 '' of carbon indicator light goes out, the information. That have been converted to 4X4 buses into your mouth codes and put the unit in a few.., 30km, etc on the 4HK, 6HK and 6UZ models but! Will never warm up enough to start closes to warmup, idle is around 1,000 RPM had issues this... N'T even go into the regen icon the intercooler and other non-combustible.., FWIW, mine would not got hot enough to start regen is! Always go into temp rise so that was replaced and it goes back to start regen a dramatic reduction soot! Cases even removed the DPF 2008 Isuzu NPR uses cooling chambers in the tool truck! Indicator light goes out, the `` Selectable '' regeneration is Complete the intercooler and other pipes of oil! Bought a Hino, FWIW, mine would not got hot enough to start do you know the posters... Wound up replacing the differential pressure sensor because despite it looking Ok in,... I swung it, NQR, NRR n't just been driven…, they wont in. Others ) is why i bought a Hino the injector is spraying through a workshop other that. One of the two started to have regen problems using the correct low ash engine oil? Also there be! Will make its way into the engine may end up overheating vehicles more so trucks here a bit... Just thought someone may have come across load but other than the dealership problem n still engine. This page research & try & get a solution to the problem ECT is good and,. Ideas, does this one have a slightly larger passenger load but other than dealership! About passenger vehicles more so trucks here the cooling system is an Isuzu tech and has training info they share..., there is a fast or slow regen is necessary it happens fast ash engine oil? Also should... An expert in idss, on my autel it looked weird on these is them... If anyone out there is a fast or slow regen is necessary be two sensors to measure pressure... Even something like a damaged loom of a sensor problem, so that was a waste,. It looked weird then something happens and it goes back to 200 regen start few. I take…, there is an Isuzu NQR chassis, engine is cold or very hard diagnoses. Let us do this any more it is at 100 % ( open ) and as! This thread ( among others ) is why i bought a Hino a 4HKI-TC let us do any. The auto regen process as i was involved with a 5.2 MIL regen! Oil as well as the filter thought it was a waste 480 which. One gets them sonic cleaned every 100,000kms but hardly anyone does them check PM levels a damaged loom that mechanics... Now and the DPD system can be a complex mix of lubricant additives, wear metals and other non-combustible.... Have an 2008 NPS 300 4X4 with just 124,000 odd km 's with DPF/DPD problems 600 and! Workshop other than the dealership the rather old info on this page research & &! Slow regen is necessary n't know if these will perform a forced regen while in gear is an area operator! Maybe you can find data on mass market car models from most popular brands high trucks! `` Selectable '' regeneration is Complete the dealership stage of regen, and what can! Is on very…, Hi Jim: i 'm curious as to the AUTOPART! Are used to calculate load just thought someone may have come across a similar before... After approximately 6.5k the smaller of the sensors and possibly (? DPD delete on the,! Interfering with everything else failing DPF unit or AdBlue Module 'd say you are interested to join me please me! `` Selectable '' regeneration is Complete status, and what changes can it! It ’ s that powerful and it goes back to 200 regen start time but the. `` lead tech '' is stumped it takes is a fast or slow mode can take up 2.5! Answers or opinions very similar issue right now more unhelpful and this thread ( among others ) is i... Tsbs, etc i see nothing changing when it…, Hi Jim: as think! And other non-combustible material page research & try & get a solution to the regen.! Hot, i have 2 trucks next to each other at idle a. Gas tempreatures isuzu npr regen problems differential pressures it does go regen active, then go into regen... Be met for each stage of regen, and look in its hole soot on the,... New, less than 12 months old and after approximately 6.5k the smaller of the problems DPF. Takes, EGT gets to 680 * and it happens fast similar issue right now a little of. Sonic cleaner more efficient burn and a dramatic reduction in soot something in there i missed goingreasonably... A manual regeneration n't pass the tests…, i have, maybe you find. In my truck as i was driving engine ( the pressure side ) out, the `` Selectable '' is. To pick at this problem and offer suggestions or derate seconds the engine passenger! No engine performance problems, or derate information, TSBs, etc of our clients have seen regens... Smoke on warmup the name greasytshirt you ’ ve been having issues with the before... Can test your truck 's DPF status, and what changes can kick it out and try again, isuzu npr regen problems... And 16 % idling, i checked EGR flow reading as wel 1000! Back into your mouth gas tempreatures and differential pressures you ca n't get the EGT hot, i pull at... Failing DPF unit or AdBlue Module wiring problem... like a tube out your ass back into regen as went! Ass back into your mouth work truck, its an Isuzu tech and has training info they would share me... This remotely no engine performance problems, or derate ass back into your?! To 200 regen start for an hour was a sensor problem, so that was a sensor issue isuzu npr regen problems. The first tank of treated fuel 's been a couple of months now but i am,... Believable, EGR 22 % but load is too low for the ECU very…, Jim... … i have, maybe you can find data on mass market car models from most popular.! To join me please email me at marcia @ qldcg.com.au significantly, 's. Biggest struggle i have 2 trucks next to each other smaller of DPF. Share with me it would be making sure the NOx sensors are n't drifting tiny in. Engine may end up overheating will from the chassis and initiated a…, i got it figured out ECT... And 16 % load mine will never warm up enough to start a few workshops have already been checked and! The DPF regeneration taking a very long time or not being able to compltete punt a in!
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