According to information I possess, I was focusing on blocks 101, 102 and 103, holding information about respectively: So yesterday, having another ' DPF field regeneration' exercise, decided to collect live data, proving my working theory. Most disturbing part is that no DTC are recorded or any visible indication on dashboard. Then it comes back again till another runī) No visible loss of liquid oil nor coolant A long run made on motorway causes it to disappear for 4-5 days depending on driving mode ( 5 days if I keep RPM's at 2K max). My current inputs supporting that are:Ī) Smoke is not constant. Later, suspecting I have excess of oil, looking to dip-stick, I have changed oil as well, still no luck.ģ:> My current assumption (working theory if You like) is that that smoke is caused by DPF regeneration. Few days later, started to have white/gray'ish smoke coming out of exhaust, on my school run, which is 2 mile to school and another 2 miles back home.Ģ:> Had almost same symptoms in 2016, while living in Helsinki, where root cause was leaking injector and counting the time passed, I've decided to replace injectors with brand new Bosch one's. Vehicle information :> Audi Q7, V6 3.0 TDI, Sline, 2007, Engine Code BUGġ:> It was Aug this year, when I've changed my CAT as flex joint was leaking exhaust gases and making terrible (in my view) noise. Here I would like to share my problem and ask Your help, where possible.īefore reaching to main question, small intro would be necessary: Vag-Com Reference Page - Note that if you are unsure of how to execute logging functions please see the following page on this site.Hope you are all safe & sound. VAG-COM Datalogging for MY2001+ Audi/VW Vehicles.
Note: In order to have a log that will be valid, you will need to see at least a 3rd gear wide open throttle run from about 2500rpm until redline. Any lifting of the throttle during the run will result in inaccurate A/F numbers for the purpose of our evaluation. This is a fuel correction table used by the computer when it senses the car richening and leaning from the programmed air/fuel tables. The numbers will be displayed as a percentage starting from 0% indicating NO fuel correction is needed. This means the car is doing what it has been asked to do. No fuel is having to be added or removed to maintain harmony. The computer can correct for these rich and lean conditions up to 25% or so. Note that seeing numbers higher than 0 does not necessarily mean your car is running dangerously rich or lean just because of a little correction. Positive numbers displayed indicate fuel is having to be added to compensate for lean conditions.
Negative numbers indicate fuel is having to be removed to compensate for a richer condition. Numbers upwards of 20 indicate some real problems that bear much closer attention. Remember that lean is your ultimate enemy. Note: This channel can not be substituted for channel 31 which displays the actual air/fuel ratio.
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