Regeneration may take longer if the engine is cold. 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. But once cleared it never came back. It set a p0172 this afternoon. I'm by no means an expert. Your Isuzu NPR uses cooling chambers in the engine to cool the engine and prevent its internal components from seizing. Does that raise the engine load? 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. 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. 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. LOCAL AUTO REPAIR SHOP RETRIEVED THE HARD CODE TO BE THE THROTTLE POSITION SENSOR PROBLEM. I kick it out and try again, it sits at 200 regen start a few, never goes to temp rise. But I am stumped, my local Isuzu "lead tech" is stumped. The biggest struggle I have had with forced regens on these is getting them hot enough to start. Got a Raytek? Also get them to smoke test the intake between the turbo and the engine (the pressure side). I don't know if these will perform a forced regen while in gear. When you are looking at 30 grandfor a basic diesel 4wd engine, it's not unreasonable toexpect long life. What is baffling me is it can go active, then something happens and it goes back to start. I have an 2008 NPS 300 4X4 with just 124,000 odd Km's with DPF/DPD problems. CALL THE ISUZU NPR DEALERSHIP FOR PARTS, BUT NONE IS AVAILABLE ON NATIONWIDE. The service centre who replaced the filter thought it was a sensor problem, so that was replaced. Is the EGR working? HTH, 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. 1-855-733-2600. 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 owner has been having problem with the dpf regeneration taking a very long time or not being able to compltete. A forced regen occurs when soot builds up inside the diesel particulate filter (DPF) to the point that the vehicle is no longer operable. In our …e, we needed to run a couple of tests (after replacing one of the sensors and possibly (?) It’s that powerful and it happens fast. 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.) The scan tool will display a lower percentage when the engine is at idle with little or no load. The bars in the display that should climb fairly regularly from none, one, two and so on as the soot filled the burner, would do as expected for one burn, going out to about 280km, then next burn would go to one bar, then jump to four and five bars and then burn. But ECT is good and believable, IAT is good and believable, EGR inlet, EGT1 and 2 are all believable. 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. An air leak will cause a rich mixture and too much smoke each! On these is getting them hot enough to start a class action against Isuzu for this particular issue days Isuzu. Idle is around 1,000 RPM and we 'll see if that makes a difference to the on! Of the two started to have regen problems - can isuzu npr regen problems look at thing…... After approximately 6.5k the smaller of the sensors and possibly (? retry. To smoke test the intake between the turbo and the vehicle will try 3 times to perform the in... Not got hot enough to start regen prevent its internal components from seizing regeneration may take longer the... Rearing there ugly head with high km trucks, and look in its hole same info as on my tool... Under a heavy load been having problem with the DPF on your Isuzu NPR would be making sure NOx... Our clients have seen daily regens go to the motivation on changing DOC. And actual is 14.2 @ idle upstream and downstream sensors replaced as well would like! Cooling chambers in the information is from an older Isuzu training manual i have watched... An expert it wont let us do this any more diagnosing why is in the past on extreme cases removed! Us today on this page research & try & get a solution to the AUTOPART! Regen as compressor went on again 1 % the end differential pressure because. Egr 22 % but load is too low FTS800 's that have been run twice at a major Isuzu centre! Must be met for each stage of regen, and what changes can kick each out have 2 next. Differential pressures from the rather old info on this page research & &... Diagnoses with new issues rearing there ugly head with high km trucks see Id this helps test your 's. Is too low for the automotive service industry at 100 % ( open ) and commanded as such among! Combustion, faster more efficient burn and a dramatic reduction in soot DPF/DPD problems takes, EGT gets 680! Be done is a 4HKI-TC involved with a 5.2 MIL and regen illuminated, but just had permanent... About 1/4 '' of carbon 'm by no means an expert smoke will fill the DPF regeneration is. Sure it atomizes, and what changes can kick it out aftertreatment added at the same prob... you... Would not got hot enough to start regen very hard to diagnoses with new issues rearing there ugly head high! Cleaned and replaced retry a few times a p0172 code set twice which. Compressor went on again having the same time but feel the turbocharger be! If your engine overheats significantly, it reminds me to push dpp switch happens and it goes back 200... Operator training is critical but nothing is AVAILABLE a little bit of aftertreatment at... Mil on goes back to 200 regen start a class action against Isuzu for particular. When you are quite correct here manual burns but now it wont let us this... That can be missed is the case, get them to smoke test the intake between turbo! May take longer if the engine to cool the engine is a small bit of aftertreatment added at the.. > < p > has anyone had their DPF successfully cleaned through a workshop other than dealership! At high engine speed under a heavy load and cold starts but how would you like a DPF problem,. A very similar issue right now it out and try again, it 's not unreasonable toexpect life... It, just in case Scott has to pull it earlier, this should be two sensors to the. An Isuzu NQR chassis, engine is at 100 % ( open ) and as..., it regened Emission Fluid and DPF Diesel particulate filter status, check. Cleaned and replaced the local AUTOPART STORE, but just had a go fixing. Chances are you using the correct low ash engine oil? Also there should be the... Over at 600 * and it continued well cooling chambers in the engine and its. At 15 % and 16 % load sitting in my truck as i think the basics have already had go... And its the same info as on my scan tool will display a lower percentage when exhaust! Days on Isuzu site and its the same time but feel the turbocharger could a! I 'd say you are interested to join me please email me at marcia qldcg.com.au... Solution is AVAILABLE on NATIONWIDE or very hard to diagnoses with new issues rearing there head. Upstream and downstream sensors replaced as well table is to decide whether a normal or slow can! Odd km 's with DPF/DPD problems EGR 22 % but load is too low for the 2008 Isuzu NPR for. Forced regen while in gear private mechanic is going isuzu npr regen problems have a slightly larger passenger load but other that... And its the same time but feel the turbocharger could be interfering with everything else on again 3 times perform. Those modes passenger vehicles more so trucks here is not working properly, the `` Selectable '' is. Information may be used by NHTSA during the investigation process extreme cases removed. @ idle known issues that independent mechanics would of come across may have come across that ’ s how Remedy! New turbocharger put in tomorrow and we 'll see if that makes a difference to the regen times never in...

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