The scan tool will display a higher percentage when the engine is running at high engine speed under a heavy load. then 220 - temp rise. "These newer Isuzu chassis with DPF no longer have any type of 'road draft' ventilation of engine gases to the ground. I had to have the filter removed, sent off for cleaning and then installed back and that's not a warranty item, as just one example. :shrug: Hi Jim: isn't working it will not stay in regen. Regen problems generally arise where city driving, excessive idling or light duty cycles are encountered. A while ago the EXH. I need fact. 99 & up 7.3L Power Stroke Engine & Drivetrain, 99 & up Upgrades and Aftermarket - 7.3L Engine, 7.3L IDI Diesels (Not Powerstrokes) 1988-1993, VerticalScope Inc., 111 Peter Street, Suite 901, Toronto, Ontario, M5V 2H1, Canada. Problem #2 - Fuel Dilution, caused by regeneration attempts. They wouldn't even cover the parts if I paid the labor; and, I believe the collection of data show there's no question the bad initial dipstick caused the eventual early engine failure. They said that was from fuel filters not having a better micron rating, alhough we were using what is specified for the vehicle. According to the filter specs the PPM has to be less than 15 but I am not sure about the bio side of it. Doing some reading on this apparently it's something to do with the DPF cyle and the fact I do a lot of short runs. What I need to know. 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. I poke through and clean it. And I noticed turbo boost desired is 15.2@idle and actual is 14.2@idle. Not very…, Hi Jim: The technicians couldn't put their fingers on what was wrong. Have you run the nozzle and SCR tests? The following are excerpts of some of the comments another contractor provided about his 2009 Isuzu chassis that is coupled with a Silent Knight sweeper: "My crews run a manual re-generation [of the DPF system] at the end of each shift to prevent this problem. "We have checked the sulfur PPM, which is between 11 and 14.5, and the bio fuel is less than 5 ppm. I see desired and actual rail pressure start to climb from 5k upto 10-11k (Low side Pressure about 120psi). But kicked out as the compressor disengaged. Should be around 20% at idle. If that's the case, then Isuzu should NOT sell them to sweeping companies! By the way, instigating a formal complaint must be done with your Isuzu dealer of record; i.e., the dealership that has your initial warranty paperwork. I'll continue to pick at this thing…, Ok, I got it figured out. Makes one wonder: Are we saving the environment or are we making someone some money for a failed system? 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. I take it out and beat it to get the exhaust hot, return and retry, it goes 200 - regen start, 220 - temp rise, then 370-regen active. Does that raise the engine load? The oil level is rising. I don't know if these will perform a forced regen while in gear. How to find your Isuzu Workshop or Owners Manual. The Diesel Particulate Filter (DPF) is best described as the “ticking time bomb” in most modern diesels.Similar to EGR problems, the DPF can become clogged up from city driving where the car does not get up to temperature.. This wasn't discovered until I opened a formal complaint in the Isuzu system. ... never gets a chance to do a regeneration burn and eventually the DPF blocks up. This is from an older Isuzu training manual: If i turned all accessories on, including ac, it regened. Got a Raytek? Here is the training manual I have, maybe you can find something in there I missed. is in the tool. But I am stumped, my local Isuzu "lead tech" is stumped. Put the injector back in and try again, it goes in 200 - regen start, then 220 temp rise, then back to 200 where it sat. 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." The differential on the Isuzu Rodeo tends to run hot, which causes the differential fluid to break down. SYSTEM light popped on, which is always accompanied by the check engine light and the regen icon. Seems to have worked. The next step is to select DPFE regeneration adpatation. Like its waiting for something. This is a real issue when you're sweeping stores that are open 24/7.". The whole engine had to be replaced to the tune of $13,000. 2016 Isuzu Npr Vehicle Speed Control Recall 16V797000. What i did find weird is I have 2 trucks next to each other. This very common failure occurs when the DPF gets old or fails to regenerate as per the normal factory regen process. The dipstick that had been installed with my engine was wrong. I perform a forced selective regen. It looks as though sweepers don't drive enough highway miles for long enough to burn off particulates properly. The KTS will bring up the next screen with particulate filter status, Engine speed, exhaust gas tempreatures and differential pressures. Then went back into regen as compressor went on again. Your EGT should get close to 1000, IIRC. This is not a unique problem to the D-max it plagues all diesel engines living in the city. Many of our clients have seen daily regens go to weekly or monthly regens. That is in service information. Anyone out there have any ideas? Ones a 2012, ones a 2018. That’s how DPF Remedy solves DPF problems starting with the first tank of treated fuel. Or, if other engine components such as EGR valves, turbochargers, injectors are fouled or not working properly. "The best I can tell after all I've gone through is that these trucks DO NOT work with sweepers on them. the injector). I have IDSS and factory service info. A computer sensor monitors the DPF and a dashboard indicator light notifies the driver that the regen is taking place, or the DPF is now cleaning. It has become obvious that parking this truck is better for me than trying to keep it running. If anyone out there is an Isuzu tech and has training info they would share with me it would be appreciated. I think after that it was a couple of sensors downline from the fuel pump. Skip to content (02) 99795933. As I think you know, the service information, TSBs, etc. I don't want opinion. EGR Delete: The Basics. Temps esnsors accurate? "I do not know if the people who designed this system counted on bio being mixed in the diesel or what impact it would have on the system... to repair this system ranges between $3000 to $8000 per sweeper. Contact us today for more information on the Isuzu engines that we service. Thanks for the reply. This is my work truck, its an Isuzu NQR chassis, engine is a 4HKI-TC. Regened for me a…. Included mid-way are some informal comments by one of Isuzu's regional managers who has long worked with sweeper manufacturers, Victory Sweepers, Inc. and Schwarze Industries, Inc. A similarity with the reports we've fielded is that all involve parking area sweepers; to date, no street-class sweeper chassis problems have been reported with the exception of one contractor you will read about that has TYMCO 435 models. Thanks but that's in service into. But once cleared it never came back. This happened repeatedly over the course of six months. To narrow down your search please use the dropdown box above, or select from one of the available vehicles in the list below. Regeneration takes anywhere from 5 to 25 minutes, depending on lots of different factors such as the amount of soot built up, type of engine and vehicle operating conditions. They kept addressing symptoms but couldn't locate any cause. I kick it out and try again, it sits at 200 regen start a few, never goes to temp rise. Isuzu Ute Australia released the anticipated seven-seat wagon version of its D-Max ute range in late 2013, with third-row seating, coil-spring rear suspension and rear axle disc brakes. Campaign Number: 16V797000 Date Manufactured: Nov 02, 2016 Vehicles Affected: 25018 Do you have any training material explaining the different regen modes? The Isuzu three-litre engine is by no means on its own in this regard, but as a modern turbo-diesel, it can be affected by problems surrounding its Exhaust Gas Recirculation (EGR) system. If that's the case, Isuzu should recall this because all diesel has bio mixed in it as well as sulfur. I get it together and try a regen. I had already replaced the exhaust brake a couple of weeks ago, but I did take the cover off and was able to adjust the stop so it would close a little tighter. DPF regeneration cycles then become more frequent, and more prolonged! This truck came in with a p244b - dpf high differential pressure, p2463 - dpf high soot accumulation, p2459 - dpf regen frequency. It sits at 200 - regen start for an hour. "I am told by my diesel delivery company rep that he is seeing this happening in trucks and that Cummins even has a recall on their system. I have done many forced regens on these trucks, but never tried in gear. A sweeper doesn't move with enough speed to keep the DPF system operational.". After about 30 seconds the engine starts to load up. This truck came in with a p244b - dpf high differential pressure, p2463 - dpf high soot accumulation, p2459 - dpf regen frequency. "We kept taking it to Isuzu warranty technicians and they'd replace some part and we'd often not even be able to go 60 miles before the engine would quit. He was quite sure of himself. This can be a sign leading to a failing DPF unit or AdBlue Module. We have three and each one is doing the same thing. First off when driving highways speeds, it does a regen about every 125-150 miles. level 2. Then, the number three injector and number four roller bearing went out on the engine when it only had about 175,000 miles on it. Should be close enough. When I did that, the person assisting me commented that he bet it was the dipstick that was the problem. What Does Code P244B Mean? And what has to happen during each one? The 2012 Im at 30gps, egr 22% but load is 1%. Next was the turbo and then the PDF filter itself. The injector is spraying through a tiny hole in about 1/4" of carbon. this last go around I did a DOC, EGT1/2, aftertreatment injector, so except for the SCR, the aftertreatment is all new. Im stumped. “You’ll notice a … We have seen these symptom more and … What requirements for each, what can kick each out. Guido. Drivers must do a manual regeneration, which takes about 20 minutes, for the unit to complete the process. We were going through a lot of injectors as well. wtf. Nothing I do seems to have any bearing on load. If you know to ask, any Isuzu truck dealer can point you in the right direction. Please remind your readers [who use Isuzu chassis] that the process is outlined in three places: Barnes also said in an email that operators may be ignoring regeneration notices, which of course would make the problem worse. It’s that powerful and it happens fast. ", Another contractor who reported DPF clogging trouble with several of the Isuzu chassis in his fleet said his dealer told him that the chassis had "no business having a slow-moving parking lot sweeper on it. This parameter displays the engine load in percent based on inputs to the ECM from various engine sensors. The funny thing is the truck doesn't even go into temp rise. History, in the last year, its gotten NOx1 and 2, DPF, Last time it was here for a EGT temp sensor code, where the egr temp sensor broken off in the exhaust manifold. "Long story short, after we replaced injectors, turbos and everything else in the system, it was discovered that the problem was that it had the wrong oil dipstick. If there is no traffic and moving ok, there is no issues. In the first 4-to-5 months the truck was in and out of Isuzu shops all the time. 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. Hmm, it is at 100% (open) and commanded as such. The Diesel Particulate Filter, commonly referred to as the DPF, can turn into one of the most frustrating parts of maintaining your '08-'10 Isuzu NPR medium-duty truck if it isn't properly taken care of. Check for a cal update? If you’ve found this article chances are you’ve been having issues with the DPF on your Isuzu truck. Now, those types of emissions are re-directed back through the engine. 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? It didn't show full until there were over two quarts too much oil in the engine. 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. See id this helps. Temps get to about 480* which is too low for the aftertreatment injector to be actuated. 2004 - 2009 Isuzu FTR/FVR/FXR 2005 - 2007 Isuzu HTR/HVR/HXR 2005 - 2009 Chevrolet or GMC T6500/T7500/T8500 2005 - 2010 Chevrolet or GMC W3500/W4500/W5500 2005 - 2010 Isuzu NPR/NPRHD/NQR/NRR SERVICE INFORMATION AFFECTED VEHICLES • 2005â 2010MY Chevrolet/GMC W-Series • 2005â 2010MY Isuzu N-Series Equipped with 5.2L 4HK1-TC Diesel Engine I kick it out and retry a few times. data lists o2 content at 15% and 16% idling, I haven't watched it driving. I have a bunch of questions though. "The diagnostics kept showing different things to be wrong. Isuzu takes pride in the technical expertise that ensures the Isuzu product is the best in the marketplace. You get better combustion, faster more efficient burn and a dramatic reduction in soot. New info. I see nothing changing when it…, Hi Jim: Original Poster 2 years ago. That kinda info. Here's what the first contractor who contacted us had to say: "...Have you heard of any other sweeping companies who run Isuzu NPR 2009 or newer chassis having issues with the diesel particulate filter (DPF)? I'm curious as to the motivation on changing the DOC. I did have a p0172 code set twice, which I cant prove out. Isuzu learned that in those situations, if the amount of oil in the crankcase was reduced by 2.5 quarts it would limit the amount of oil that would end up in the intake system. This proceedure can be done is a fast or slow mode, ( Slow mode can take up to 2.5 hours). This is the silent, but severe problem with the Isuzu DPD system. The exhaust brake valve is installed in front of the DPF…. There is a CD in every Isuzu chassis that the driver can listen to. Contact Us. The procedure for diagnosing why is in the information. You will need a really good OBDII scanner to read the codes and put the unit in a manual regeneration. Passages clear? In our …e, we needed to run a couple of tests (after replacing one of the sensors and possibly (?) The DPF is an emission filter that reburns Particulate Matter (PM) much like a … HTH, However, Barnes' tips about manual regeneration may not be the cure. Report Save. I'm by no means an expert. We have contacted Isuzu and provided the company representatives with the information. Nothing happens. DPF regeneration fluid, Large exhaust leaks, DPF pressure sensor, Open or shorted circuit/s: We recommend Torque Pro. 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. Unless…, I changed the doc, because in my experience, if the thing is dosing and not making fire, the doc is worn out. However, that contractor uses his machines for parking area sweeping. Then it will continue to start and stop regen on its own…, Gotta love this, from Isuzu training... Thanks for the thoughts. If this is not done then the DPF becomes clogged and has to be cleaned at the dealer. I have fought this issue and this truck and gave up 2 years ago. A forced regen occurs when soot builds up inside the diesel particulate filter (DPF) to the point that the vehicle is no longer operable. The scan tool will display a lower percentage when the engine is at idle with little or no load. So I take out the get the egt hot, I pull over at 600* and try the regen. (Editor's Note: The only recall we found doing an online search was for particular 2007 Cummins models.). One time they replace the mass air system; then they changed two injectors. But I am stumped, my local Isuzu "lead tech" is stumped. Then it would Regen. And that's the only thing I don't like, Id like to see atmosphere at idle. This would seem to imply that the slow speed of parking area sweeping may play a part in the DPF system failures. The Isuzu Rodeo's fuel pump system is known to develop small holes and leaks, which causes the vehicle to lose power on acceleration, show inconsistent fuel gauge readings, and issue smoke from the exhaust system. Less soot = Less need for DPF regeneration. Archive View Return to standard view. During regeneration, the engine injectors are fired during the exhaust stroke, sending fuel down the exhaust to ignite the catalyst. An active regen cycle is a normal process that takes place as the truck is going down the road. That table is to decide whether a normal or slow regen is necessary. Is the Isuzu D-max a god ute? [The chassis] dies on the side of the road with no warning. I don't have much in the way of answers or opinions. I subbed for 3 days on Isuzu site and its the same info as on my scan tool, so that was a waste. I mean like 20-warmup, 200-regen started, 220-temp rise, 370-regen active those modes. I would download it, just in case Scott has to pull it. I didnt know which values to trust so i swung it. If I take…, There is a little bit of aftertreatment added at the end. It has turned out to cost me much more per day to run that all of my other (old) trucks combined. 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. It set a p0172 this afternoon. System goes 200 - regen start. Are the NOx heaters working? 3. share. Isuzu D-max common problems. "The local dealer said our air filters were too dirty so we started blowing them out each week and replacing them on a VERY regular basis. I took it to dealers in three different locations, Dallas, Texarcana and Waco, in order to try to find a solution to the DPF system fouling out. When the exhaust brake closes to warmup, idle is around 1,000 RPM. "After all these months of trying unsuccessfully to get the engine fixed before finding the solution, we had to replace a couple more injectors and Isuzu told me that was my problem, not theirs. Sits there awhile. The biggest struggle I have had with forced regens on these is getting them hot enough to start. from July 2016; to September 2019; last updated – posted 2019-Sep-17, 8:57 pm AEST posted 2019-Sep-17, 8:57 pm AEST User #396911 8 posts. As I mentioned earlier, this should be in the service information in the tool. But ECT is good and believable, IAT is good and believable, EGR inlet, EGT1 and 2 are all believable. (Even our work Hilux had a DPF problem at 40,000Kms) Dedicated to delivering highly technical courses for the automotive service industry. We have made this part of their daily routine to ensure we get full regenerations each shift but... our DPF continues to clog up and the costs keep coming. designed to perform the important role of capturing soot and exhaust contaminants before it has a chance to be released into the environment "I have a TON of emails on this issue with Isuzu and the local distributor and I have a TON of money wrapped up into my truck. While this climbs Injector 3 Balance goes Negative and Injector 4 Balance goes positive. "As a result of having too much oil in place all the time, pure oil was being dumped back into the engine's system.That was overloading every component; fouling injectors, turbos and the DPF filtration system, since the system is not capable of atomizing oil.