adrianctin

Hello, I'm making this post in the hope that it will help others. I bought a skoda octavia 3 cxxb, euro6, 1.6 tdi 110 hp, manual, at 205000km, year 2017 prefl, and it confused me with exaggerated regenerations in the city, like 100 km interval, and it started dancing because I know the engine and I know that it can last longer. Technically the car didn't seem to have any problems and it doesn't, all I found was one of the differential pressure sensors that was out of calibration, and I changed both OEM ones. The improvement was 10-15km. The real problem was with the mathematical model through which it did the calculation for the calculated soot, which was running faster than the measured one. I had software 6336 on it, which is actually the penultimate update for this configuration. I did the first downgrade to 5693, not finding much information at first, but the improvement was minor, with an interval between regenerations of 140-150 km. On this software I started looking only at calculated and measured, and the difference was enormous, like at 80 km in urban areas I had 18g calculated and 7g measured, and etc etc, I decided to go down to the first series of software available for the Delphi ECU on this car, the latest version of that series, 27xx. On this configuration, there are the software series 2x, 3x, 5x, 6x, and 9x, but I deduce that 2x would be the factory one, eu6, and the rest are updates. I think 3x is also more relaxed in terms of algorithm, as I had it on 2 other 1.6tdi eu6 cars, but from 5 onwards, it's a headache. Many people told me that this is how I do euro6, that I'm downgrading in vain because it's not the same thing as with euro5, when the solution was clear. However, the calculated soot since installation started to decrease its calculation speed, by a proportion of 42%. Mathematically, it was already a sufficient improvement, to take me to 200 urban km. On the first cycle I had 210 km with 50km extraurban, there was already a difference. On the first regeneration I noticed that it emptied to 4g, and before it didn't drop below 7g, 8g. Now I checked again at 185 urban km, and the calculated soot is at 16.5g, the engine sounds good, the consumption decreased a little (it was good anyway). So, it's not the same major difference as the ea188 engines that had the deceptive update, but there are also big differences on the ea288 compared to the factory software, and the updates that followed. Plus I found that although the group officially stated that only Euro5 cars were involved in the scandal, it seemed logical to me that those that were under construction, namely Euro6, would leave the factory with other algorithms. I hope it will be useful for others who are in my situation