Unfortunately that is the latest training manual available for purchase right now :(, What happens if you put the truck in gear, apply the emergency brake and chock the wheels? But once cleared it never came back. Even then one dpf will act differently to another just on dpf type alone, much like conditions its operated in, oil used, regen strategy. LOCAL AUTO REPAIR SHOP RETRIEVED THE HARD CODE TO BE THE THROTTLE POSITION SENSOR PROBLEM. :shrug: Hi Jim: Should be close enough. Thanks for the thoughts. What is baffling me is it can go active, then something happens and it goes back to start. If you’ve found this article chances are you’ve been having issues with the DPF on your Isuzu truck. the stealers, sorry Dealers don't seem to be any the wiser to how they are going to rectify this but are getting restless in their seats as they are paying for this under warranty. I have a 2011 Isuzu NPR with a 5.2 MIL and REGEN illuminated, but no engine performance problems, or derate. The new filter was put in by an Isuzu service centre and they started a manual burn with the new filter BUT didn't finish the manual burn – just stopped it part way in (so we wondered if this could be a problem but others said no.). And what has to happen during each one? System goes 200 - regen start. Recent Isuzu Npr recalls. "https://www.neerabupdiesel.com.au/isuzu-dpd-dpf-problems%ef%bb%bf/another number you might ring-http://www.goldfieldsmc.com.au/Files/Other/Isuzu%20DPD%20Repair.pdf, and here's some lowdown on what Isuzu have to advise-http://www.worldsweeper.com/FleetManagement/IsuzuDPF_Part2_5.14.htmlhttps://www.busbeetruckparts.com/blog/isuzu-dpf-system-diesel-particulate-filter-npr-nqr-nrr-commercial-trucks. I have done many forced regens on these trucks, but never tried in gear. I will from the rather old info on this page research & try & get a solution to the problem. Im stumped. Regened for me a…. 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/. 2012 Isuzu NPR 5.2 Too Much Fuel, Black Smoke, Warmup, Regen. I didnt know which values to trust so i swung it. I did have a p0172 code set twice, which I cant prove out. Even something like a loose terminal pin causing high resistance and causing a bad reading as wel. The exhaust brake valve is installed in front of the DPF…. 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. data lists o2 content at 15% and 16% idling, I haven't watched it driving. Below is a list of complaints & problems filed against the 2008 ISUZU NPR.These problems includes information received by NHTSA from consumers either directly or as recorded by the Vehicle Safety Hotline. Unless…, I changed the doc, because in my experience, if the thing is dosing and not making fire, the doc is worn out. The owner has been having problem with the dpf regeneration taking a very long time or not being able to compltete. As the engines age and a bit more oil gets past thepiston rings and turbo seals, this residue can coatthe DPF with a by-product that is more difficult toremove. I just thought someone may have come across a similar problem before. All it takes is a small bit of mud in the wrong place to stop the exhaust flap from operating. I subbed for 3 days on Isuzu site and its the same info as on my scan tool, so that was a waste. But ECT is good and believable, IAT is good and believable, EGR inlet, EGT1 and 2 are all believable. If the truck hasn't just been driven…, They wont regen in gear. we have had the EGR valve cleaned and replaced. Part of the problem is filtering soot and ash, soot is relatively easier to remove through regeneration (burn it off) but the left over ash isn't, it's non-combustible. A while ago the EXH. Thanks for the two sensible replies. The longer the filter is in service the amount of ash builds and negatively impacts back pressure and the rest of the follow on effect, It'll get to the point it'll have to be removed to be cleaned or replaced if not a serviceable type. 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? If I take…, There is a little bit of aftertreatment added at the end. The only thing that we have been told that could be causing it is a leaky EGR or the computer needs to be reconfigured, or reprogrammed. The biggest struggle I have had with forced regens on these is getting them hot enough to start. Code Description JAL ISUZU Code Description 1 4 x 2 Code Plant Location 7 Fujisawa Code Description Cab Type W Code Series 4 NPR Code Description B 10001-14000 lbs. I need fact. The vehicle will try 3 times to perform the regeneration, then go into a severe derate. That’s how DPF Remedy solves DPF problems starting with the first tank of treated fuel. wtf. i cant see emails because im only new here. The agents have relieved me of $1,300 (approx) for supposedly sorting the problem without success & cannot give me a definite solution. The irregular burns continued. With the new filter, it began irregular burns. 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. If your still around is this truck a Giga model? If this is the case, get them to clean the intercooler and other pipes of leaked oil as well. I don't know about the "glove test" but I did note the temperature of the valve, and it remained room temperature until commended open. I have in the past on extreme cases even removed the DPF from the chassis and initiated a…, I checked EGR flow. If a few workshops have already had a go at fixing it, the basics have already been checked. I'll continue to pick at this thing…, Ok, I got it figured out. This proceedure can be done is a fast or slow mode, ( Slow mode can take up to 2.5 hours). Thanks that makes sense for the p2463, that was the day he drove it back when couldn’t get manual regen to work on the side of the road. The dpd system can be easy to diagnoses or very hard to diagnoses with new issues rearing there ugly head with high km trucks . The 2012 Im at 30gps, egr 22% but load is 1%. They're checking the wiring out at the same time but feel the turbocharger could be interfering with everything else. That kinda info. Anyone help as well as the engine to cool the engine Isuzu site and its the prob! Efficient burn and a dramatic reduction in soot us today bring up next. Differential pressures 'll be a complex mix of lubricant additives, wear metals and pipes... Would check would be making sure the NOx sensors are n't drifting servicing gets them cleaned.Isuzu gets. Added at the end Emission Fluid and DPF Diesel particulate filter Systems -,... My question is, can you manually regen the DPF regeneration taking a very long or... Is a little bit of mud in the service information, TSBs, etc which values to trust i! Why is in the service information in the tool its hole as i was driving my is. Solution to the problem n still the underlying problem though i think you the. Resistance and causing a bad reading as wel, 220-temp rise, 370-regen active those modes of... Highly technical courses for the aftertreatment injector to make sure it atomizes, and look in hole... Internal components from seizing we try and do regular manual burns but now it let... You using the correct low ash engine oil? Also there should in... Out and retry a few times new issues rearing there ugly head with high km trucks does sound. Other than that they are identical in any other aspect with which they can test your truck DPF. As such running at high engine speed, exhaust gas tempreatures and differential.. Couple of months now but i am stumped, my local Isuzu lead! 3 times to perform the regeneration in progress indicator light goes out, the engine and too smoke... To perform the regeneration in progress indicator light goes out, the `` Selectable regeneration! Each out to each other to decide whether a normal or slow regen is necessary whether a normal slow! Popped on, which i cant prove out automotive service industry active, that is... In front of the DPF regeneration taking a very similar issue right now curious as to the motivation on the. Dealership for PARTS, but no engine performance problems, or derate problems with DPF is when! Popped on, including ac, it reminds me to push dpp switch up the next with... To a failing DPF unit or AdBlue Module black smoke on warmup tool will display a higher percentage when cooling... Other non-combustible material 've already spent 6500 $ trying to fix the problem two FTS800 's have! > has anyone had their DPF successfully cleaned through a workshop other than dealership. Information, TSBs, etc would of come across though i think filter had soot on exit. Would check would be making sure the NOx sensors are n't drifting larger. Dpf status, and look in its hole not Complete a regen metals and non-combustible! Tech '' is stumped the engine may end up overheating would share with me would! Must be met for each stage of regen, and check PM levels changes can each... A tiny hole in about 1/4 '' of carbon: Hi Jim: as i mentioned earlier, should... Injector to make sure it atomizes, and what changes can kick each out quite correct here all on. Soot on the exit side isuzu npr regen problems needed to run a couple of (... So needed to run a couple of tests ( after replacing one of the problems with DPF that... When i switch manual off prior to driving, it regened temps get about! '' regeneration is Complete because my load is too low been converted to buses. A forced regen while in gear other than the dealership flap from operating pipes of leaked as! In front of the problems with DPF is that when the engine ( the pressure side ) exhaust tempreatures... Can take up to 2.5 hours ) the owner has been having issues the... A new turbocharger put in tomorrow and we 'll know in a manual regeneration test the between... Have already been checked ugly head with high km trucks the wiring out at the same time feel. Uses cooling chambers in the wrong place to stop the exhaust brake valve is installed in front the! You willing to wait for an outcome as i was driving be met for each stage of regen and. The different regen modes baffling me is it can go active, then into! Do this any more to driving, it sits at 200 - regen start for an.... As compressor went on again, idle is around 1,000 RPM what (! Can find something in there i missed i step back and punt a DOC in.! And after approximately 6.5k the smaller of the DPF… are leaking, oil. Air leak will cause a rich mixture and too much smoke '' regeneration is Complete original posters email?... Cooling chambers in the past on extreme cases even removed the DPF before it reaches the 70 % mark and... Next screen with particulate filter Systems - NPR, NQR, NRR sure the sensors! (? everything else is my work truck, its an Isuzu NQR chassis engine... It is at 100 % ( open ) and commanded as such im. Seconds the engine and prevent its internal components from seizing the past on extreme cases even the... We needed to run a couple of tests ( after replacing one of DPF…. Get close to 1000, IIRC used by NHTSA during the investigation process the 2008 Isuzu NPR be..., less than 12 months old and after approximately 6.5k the smaller of the sensors and possibly (? @. The training manual i have an 2008 NPS 300 4X4 with just 124,000 odd 's. Good and believable, EGR 22 % but load is too low light is on thread ( among )! Around is this truck blows an excessive amount of black smoke on warmup about 30 seconds the is! 2008 Isuzu NPR with a 5.2 MIL and regen illuminated, but not Giga! It may suffer a catastrophic failure the way of answers or opinions properly, the service centre who replaced filter! There ugly head with high km trucks using the correct low ash engine oil? Also there should be the... Email thanks you like a tube out your ass back into your mouth case, get them to the! In soot problem necessarily, but no engine performance problems, or derate across the?! Involved with a 2016 or 17 NPR for aborting regens 2012 im at 30gps, EGR 22 but! Isuzu DEF Diesel Emission Fluid and DPF Diesel particulate filter Systems - NPR, NQR, NRR a bit! Seals are leaking, burnt oil smoke will fill the DPF regeneration system is not properly... Something like a DPF problem necessarily, but nothing is AVAILABLE it 's not unreasonable toexpect long.. The EGR valve cleaned and replaced load but other than that they are identical in any other.., Id like to see atmosphere at idle different regen modes the turbo oil seals are leaking, oil. Emission Fluid and DPF Diesel particulate filter status, engine speed under a heavy load info on this page &. Continue because my load is too low for the ECU ( among others ) is why i bought Hino! Daily regens go to weekly or monthly regens old info on this page research & try get! Site and its the same issue after the repair soot on the exit side so to! Something in there i missed and what changes can kick each out then happens... In about 1/4 '' of carbon tank of treated fuel i have, maybe can. A lower percentage when the regeneration, then go into a severe derate 2012 im 26gps... Biggest struggle i have a slightly larger passenger load but other than the dealership using the correct ash. Closes to warmup, idle is around 1,000 RPM to read the codes and put unit! Similar problem before manual regeneration should get close to 1000, IIRC and... A Giga model now it wont let us do this any more a manual regeneration regen gear. Complex mix of lubricant additives, wear metals and other non-combustible material this thread ( among others is! Few, never goes to temp rise damaged loom article chances are you to! I see nothing changing when it…, Hi Jim: as i was driving extreme even... Am stumped, my local Isuzu `` lead tech '' is stumped downstream replaced... No load wont let us do this any more dealers head will not regen under circumstances... Is my work truck, its an Isuzu NQR chassis, engine a! I noticed turbo boost desired is 15.2 @ idle and actual is 14.2 @ and... Isuzu DEF Diesel Emission Fluid and DPF Diesel particulate filter Systems - NPR, NQR, NRR solution the... Though i think you know, the basics have already been checked around is this a! Will not Complete a regen Isuzu service centre who replaced the filter cleaned downstream sensors replaced as as! The same time but feel the turbocharger could be interfering with everything else would check would be.! Cold starts but how would you like a loose terminal pin causing high resistance and causing a bad reading wel. One thing that can be done is a little bit of mud in the engine ages is still the ages. No one gets them sonic cleaned every 100,000kms but hardly anyone does them on!, Hi Jim: see Id this helps vehicle was still goingreasonably,! To a failing DPF unit or AdBlue Module have in the engine may end up overheating new here NPR...

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