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Hmm..just talked to a mechanic, he is 100% sure that they replace fuel filters on all the trucks at every PM, which is 12-13K miles. We buy them from our local Hino dealer. Is there anyway to figure out what individual injector is giving a problem? Like some type of return flow test by turning...

On this particular truck we had coolant leak inside DEF tank and it was fixed by replacing the whole tank with accessories. Could that lead to DEF getting into cooling circuit? If so, then it explains the issue with injector cups.

found more records for this truck (2011 268 with 155K miles) had next services done by the dealer: - at 85K "TURBOCHARGER AND CONTROLLER HAD FAILED. - Replaced under warranty REPLACED TURBOCHARGER, HARDWARE AND CONTROLLER. BCU WAS MISSING. INSTALLED CUSTOMER SUPPLIED BCU. REPROGRAMMED BCU...

Had that burner cavity blown out with the air. When doing injection quantity test engine speed stayed pretty much around 1492-1508 rpm all the time. injection quantity was going between 8.2 and 9.8. For the max DPR out temp before we had sys.protection data reset, it was in 1780sF:eek: Also...

Can't figure out how to send the file. But the bad thing is that there is lots of soot in the pipe after the driver got confused and took the truck for a long trip last week so I guess we'll have to replace DPF As for now there is still P200C present, although max out temp in system protection...

Afterwards did a regen, saved process data as you told me in txt. I'll try to send it to you. on the graph exhaust was already warm. but when SCR was still cold nozzle pressure was -2 then jumped to 45-46 psi and warmed up burner and kept it around 750F

Had all elements cleaned up yesterday. That's how it looked like :( After cleaning a nozzle I sprayed cleaner through it and had it sprayed nicely through each hole, so I assume the nozzle is ok.

ok. I missed it. you already mentioned outlet temp.

Thanks a lot. We gonna do all of that tomorrow. Should have all parts ready. Btw, when i was monitoring burner data, Exhaust Temp DPR Outlet seems to show inadequate signal (in a range of -495F - 1200F constantly dropping). I'll try to attache a graph. Is there a sensor at all, or it is faulty...

Hi greasytshirt, What a great forum. We have 268 2011, using DXII. I don't see BCU besides other modules, so I assume it does not have one. it has active p200c (we had DEF quality DTCs, replaced NOx sensors, then the problem seemed to be solved, but next day truck barely made it back to the shop...