Have collected live data, but failed to interpret it. Switching to LAMDBA sensor today, as it seems to be able to measure back-pressure in exhaust pipe,Ģ) Exhaust gas temperature at lambda probe What else can trigger PDF regen if DPF filter itself is clean > Example PDF readings from resting place just before my return journey > PDF carbon mass actual is zero Here we come to another question:> what is back pressure in exhaust pipe: Little history here: Reason I have changed CAT was flexy joint, which was leaking and making terrible noise, so from the point of replacement, all exhaust gases escaping from the hole needed to go into DPF. So, question 1 here is: What are normal operational conditions of PDF ? What indicates that PDF is blocked ? Value before '-14' is actual DPF pressure diff sensor reading, which reached max of 71, but on RPM average of 2,000 was on value of 21 milibars. Looking for 3 particular indications, (a) Conditions, on which ECU decides to trigger emergency DPF regen, (b) Obvious indications that DPF is clogged and lastly (c) Any abnormal sensory data, described in SSP 350/351 as cause to trigger regen.ģ:> Last night, heading back to another 'reset' in my terms, have captured live data, unfortunately, file is too big to upload, sol will put some key points:Ī) Having a smoke heading for 1H long run on M4 Have my VCDS hooked-up for last 3 days, but realised, Measuring block list available on internet is not quite matching with what I am reading. Latest, had been suggested to clean DPF, as it looks like a result of emergency DPF regeneration.Ģ:> Before going into DPF cleaning and/or buying new one, decided to analyse, in remit of my abilities, what is happening with engine. As smoke continued on periodic bases, replaced engine oil as well, since some of forums are suggesting excessive oil can cause same smoking. Had white smoke problem in 2016 when living at Helsinki, replaced the injectors with refurbished one's and problem had gone, so this time had them replaced with brand new Bosch made. Noticed that it starts to come 4-5 days after long run. Before getting into question, small intro would be appropriate, I believe:ġ:> After having my CAT replaced (with German non original), started to have white/grey'ish smoke, which come occasionally.

Vcds measuring blocks list pdf