Here we go again, $$$$$ 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?

Doesn't solve your problem now. Hey Jon we have a resident mechanic by the name greasytshirt. Thank you, 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 theregen process. 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. I don't work on these very often so it's a good thing to know. 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? feel the turbocharger could be interfering. Installed OE turbocharger and replaced map sensor (I broke the original taking it out to clean) No vacuum leaks detected. Just a follow up to this, we are still having issues and are very stuck now. Its time this Company was held to account. 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. No private mechanic is going to have a sonic cleaner. In fact, with over 80,000 visitors per month, our site is by far the most popular expedited freight destination on the Internet! 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. Need to see if they found the reason for it..dont want to spend thousands on guessesThanyou Debbie, Hi, can you see the original poster email....I would like to email them to see if they resolved probThankyou. You'll have to park for about 15 minutes to accomplish this.

First off when driving highways speeds, it does a regen about every 125-150 miles. We try and do regular manual burns but now it wont let us do this any more. Thanks. At 400,000k the DPD filter was replaced and it continued well. Isuzu npr regen problems Isuzu npr regen problems. The issue of deterioration as the engine ages is still the underlying problem though I think. Oh, extra info – in the last five days it has started asking for a manual burn on top of the many irregular burns. I …

I have a 2012 Isuzu NPR-HD with approx 90k miles and am having issues with DPF regen and Catalytic Converter. But I am stumped, my local Isuzu "lead tech" is stumped.

110. please provide f. 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.

If so have you checked it to make sure it is not turned up? Has anyone got OP email ? They're checking the wiring out at the same time but feel the turbocharger could be interfering with everything else. Even something like a loose terminal pin causing high resistance and causing a bad reading as wel. 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. All Rights Reserved. 2018 Isuzu NPR HD Tilt Cab. One thing that can be missed is the earth point for the ECU . We're using the right oil. If a few workshops have already had a go at fixing it, the basics have already been checked. Yes, I'd say you are quite correct here. When you are looking at 30 grandfor a basic diesel 4wd engine, it's not unreasonable toexpect long life.

Upstream and downstream sensors replaced as well as the filter cleaned. 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. My question is, can you manually regen the DPF before it reaches the 70% mark? 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. 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. Or it could be a combination of things or a performance issue. The service centre who replaced the filter thought it was a sensor problem, so that was replaced. NPR came in with 1800 rpm idle when in park or n. Goes to stock idle in gear.

I just thought someone may have come across a similar problem before.

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. Hello, we are having the same prob...do you know the original posters email thanks?

Isuzu 2011 NQR 450 290 000 Km. Walked away and called bus owner. The agents have relieved me of $1,300 (approx) for supposedly sorting the problem without success & cannot give me a definite solution. The very helpful mechanic felt it was a faulty filter and, to eliminate that, since it was only a week in, swapped it over for another in stock but nothing changed, so definitely not a faulty filter or the sensor since both have been replaced. I guess we'll know in a few days. ExpeditersOnline.com® is a registered trademark of On Time Media, LLC. Our solution provides clients with the improved reliability they seek along with the welcome addition of increased power, smoother driveability and better fuel economy. If this is the case, get them to clean the intercooler and other pipes of leaked oil as well. I second Rickys suggestion.

PM him your situation (cut and paste) your OP and you should get a quicker response. EGR only works at low revs and cold starts but how would you like a tube out your ass back into your mouth? 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. 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 . 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 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. I pulled over and thought may as well do it manually as I’ll be stationed for an hour or so.. Regen bars are still full and nothing has been done. Last time i had issues like this it was the injectors. This is completely unhelpful but we had the same problem on the same model truck and couldn't get on top of it,ended up auctioning it. They are both new, less than 12 months old and after approximately 6.5k the smaller of the two started to have regen problems.


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