Constantly read the measured value block 13 and 14 for the smooth running control in the engine control unit. The values of one or several cylinders should noticeably move to positive.
Check your coolant/fuel temps also check your rail pressure
Smoke can be poor fuel or injector leakage so also consider checking the oil for high fuel content
or
| Technical product information |
Transaction No.: 2013969/15 |
| Thin engine oil, white smoke or juddering at idle speed - V6 2.7 l/3.0 l TDI |
Release date: 05-Nov-2011 |
Customer statement / workshop findings
White smoke from the exhaust system and juddering when the engine runs at idle speed for some time - V6 TDI 2.7l / 3.0l TDI.
Technical background
Mechanical wear of the needle attachment of the injector leads to an increased fuel injection into the combustion chamber. The fuel is not completely burnt, which causes white smoke (unburnt fuel) or juddering when the engine runs at idle speed for some time.This complaint occurs only on vehicles with more than 50,000 km.
Production change
Modified injectors from:8E47A0403604F37N0267504EX7N0042044L*7D049162
Measure
Read the measured value blocks 72 - 77.3 values per measured value block appear there (for 300 bar, 600 bar, 1000 bar). Should the values be higher than minus -45 ms (example - 60ms) or on digit 2 be higher than minus -15 ms (e.g. 20ms), the needle attachment is worn and the injector is incorrect. To avoid repeat repairs, replace all 6 injectors. >>>> Observe the algebraic sign (minus) in measured value block 72-77 !!!!! <<<<<
