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. That is in service information. is in the tool. I have a bunch of questions though. A forced regen occurs when soot builds up inside the diesel particulate filter (DPF) to the point that the vehicle is no longer operable. 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. This is possible. Your EGT should get close to 1000, IIRC. This parameter displays the engine load in percent based on inputs to the ECM from various engine sensors. I perform a forced selective regen. This is my work truck, its an Isuzu NQR chassis, engine is a 4HKI-TC. If this is the case, get them to clean the intercooler and other pipes of leaked oil as well. Thanks for the two sensible replies. 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. Nice but as you say not quite legal mine apparently is legal but all the equipment is still there as its too hard to take it all out apparently . 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 This truck blows an excessive amount of black smoke on warmup. I'm by no means an expert. When the regeneration in progress indicator light goes out, the "Selectable" regeneration is complete. CALL THE ISUZU NPR DEALERSHIP FOR PARTS, BUT NONE IS AVAILABLE ON NATIONWIDE. ON 03/12/12 ASK THE LOCAL AUTOPART STORE CALL DIRECTLY TO THE OEM GAS PEDAL, NONE IS … If the vehicle were to be driven very far after the red light comes on, the system will go into what we call 'limp home mode' and must be taken to an Isuzu dealership to have a regeneration initiated by a scan tool. I have an 2008 NPS 300 4X4 with just 124,000 odd Km's with DPF/DPD problems. Passages clear? I can do the DPD delete on the 4HK, 6HK and 6UZ models, but not the Giga's. It is clear that you are not getting to temp for diesel dosing, I have tried driving the crap out of them and forcing a regen too, but if whatever gets the exhaust hot (VGT, throttle blade, etc.) If it didn't pass the tests…, I have a Isuzu with a very similar issue right now. We try and do regular manual burns but now it wont let us do this any more. was a very expensive extercise, Hi I'm just going to ask a few questions about your truck if that's okay.1 what work does the truck do freight , city or long haul driving 2 does the isuzu dealer service the vehicle 3 the soot on the other side of the dpd filter did it start after any other issues engine light on , truck just serviced.4 has the wiring connection been checked over. I have in the past on extreme cases even removed the DPF from the chassis and initiated a…, I checked EGR flow. f01​.​justanswer​.​com/diesel3153/95d…​.​pdf 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. As I think you know, the service information, TSBs, etc. Got a Raytek? "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. Anyone out there have any ideas? Isuzu truck DPD regen problems - can anyone help? Has anyone got OP email ? I take out the aftertreatment injector to make sure it atomizes, and look in its hole. If your engine overheats significantly, it may suffer a catastrophic failure. I don't know if these will perform a forced regen while in gear. i cant see emails because im only new here. Woah. The scan tool will display a higher percentage when the engine is running at high engine speed under a heavy load. Here is the training manual I have, maybe you can find something in there I missed. Should be around 20% at idle. 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. Need help figuring it out. 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. If you can't get the exhaust temps hot enough, the truck will not regen under any circumstances. If I turn on ac and lights etc and get load to about 6, regen will start and 220-temp rise mode will begin​.​As the compressor cycles and load goes below 5, regen kicks in and out. Many of our clients have seen daily regens go to weekly or monthly regens. 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? Blog. One of the problems with DPF is that when the engine. If there are any new similar experiences out there who have managed to fix the DPF problems on similar vehicles without mortgaging the family home or taking the truck to the dump, I would like to hear from them. but how would you like a tube out your ass back into your mouth? The Isuzu DPD (Diesel Particulate Diffuser) also referred to as a DPF (Diesel Particulate Filter) was first introduced to the … When I switch manual off prior to driving, it reminds me to push dpp switch. Posted to Asian Electrical on 8/2/2016 5 Replies. The mess hadn't been helped by home maintenance with cheap oil, but the mix of blow-by, EGR and extendedchange intervals had left the intake plenum with a sectional area of 4 square centimetres at the head interface instead of the normal 12. What requirements for each, what can kick each out. 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'. But I am stumped, my local Isuzu "lead tech" is stumped. I’ve left it idling on 2 occasions for over 40 mine and it didn’t drop a bar.. Howver, I can smell the burning.. This is even more unhelpful and this thread (among others) is why I bought a Hino. Should be close enough. Do you have any training material explaining the different regen modes? This proceedure can be done is a fast or slow mode, ( Slow mode can take up to 2.5 hours). Your Isuzu NPR uses cooling chambers in the engine to cool the engine and prevent its internal components from seizing. Im out of ideas, Does this one have the exhaust brake by the DPF? This will make its way into the engine and cause the same issue after the repair. The scan tool will indicate the progressive soot loading of the filter and should display any fault codes and live data, then the info helps steer the tech to the faulty area. In our …e, we needed to run a couple of tests (after replacing one of the sensors and possibly (?) 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. Firstly, it's very difficult to diagnose a problem like this remotely. To give you an idea that Mann Hummel Provent 200 (don't buy pretenders) will pull around 180-200ml of crankcase blowby oil out of the intake system over the 12M/15000kms service interval and even if you don't have an egr delete setup it won't be adding to your inlet manifold or DPF clogging. The irregular burns continued. Hello, we are having the same prob...do you know the original posters email thanks? You can its in the setting but mine would do the burn every 250 to 300 k's automatically and to be honest you hardly notice it usually between ten and fifteen minutes for the Isuzu. yet we still continue to have problems. The biggest struggle I have had with forced regens on these is getting them hot enough to start. I had an FRR600 where the had become a problem apparently the former ownewr every time it came up to do a burn turned the engine off in the end I think the computer just gave up trying .Took it into Isuzu ballarat and they reest the computerbut also changed part of the exhaust system as apparently they are prone to splitting which can alter the burn procedure. Yes, I'd say you are quite correct here. 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. Recent Isuzu Npr recalls. 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. I'm ready to start a class action against Isuzu for this particular issue. data lists o2 content at 15% and 16% idling, I haven't watched it driving. When the cooling system is not working properly, the engine may end up overheating. As I mentioned earlier, this should be in the service information in the tool. Then went back into regen as compressor went on again. An air leak will cause a rich mixture and too much smoke. Regen wont continue because my LOAD is too low. 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. 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? Thanks. But lots of known issues that independent mechanics would of come across. This truck came in with a p244b - dpf high differential pressure, p2463 - dpf high soot accumulation, p2459 - dpf regen frequency. After that I was able to heat up and start regen but now it keeps stopping after about 20 minutes with a "70 stop regen" pid. My feeling is that even an aging turbocharger isn't going to produce soot at a standard rate for 280km then produce soot at 400% higher rate for 30km to trigger a burn, then go back to a standard rate of soot production, then 300% more, and then normal and so on (and the short burns where the bars on the display jump from one bar to four or five happen in both city driving and open road 100km of 100kph driving). Unless…, I changed the doc, because in my experience, if the thing is dosing and not making fire, the doc is worn out. It sits at 200 - regen start for an hour. We're using the right oil. My Chev which takes adblu kept putting messages about the quality of the product up and I could notget rid of it so as Performax and Isuzu are linked back up to ballarat where they could not fix it (I paid 1.500) then they wanted another 1200 for two nox sensors at that point I bit the bullet as it was obvious that ISUZU did not know how to fix the problem and throwing expensive parts at it was no guarnatee it was fixed .In the end I got the car chipped o.k. Can anyone look at this problem and offer suggestions? Like its waiting for something. Oh, extra info – in the last five days it has started asking for a manual burn on top of the many irregular burns. 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This it was a sensor problem, so that was replaced have already had a go at it! Passenger load but other than that they are both new, less than months. To 1000, IIRC now but i am stumped, my local Isuzu `` lead tech is. Past on extreme cases even removed the DPF regeneration taking a very long or... Commanded as such pull it npr200 which began the auto regen process as i write this sort of freaking..! Engine is a small bit of mud in the information any different in other...
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