Sunday, November 25, 2018

******** Audi A6 Sedan (4F2) V6-3.2L (CALA) Technical Service Bulletin # 011125 Date: 110616


Fuel Sys. - Long Crank Time/Rough Idle With Hot Engine



01 Extended cranking time when engine is hot and/or rough idle after startup



01 11 25



2026718/1



June 16, 2011



Affected Vehicles



Condition



^ Extended cranking time when engine is hot and/or rough idle after startup.



232



^ No DTC is stored in ECM memory.



Technical Background



One or more fuel injectors may be stuck open, allowing fuel to enter the combustion chamber when engine is hot. Drop in fuel pressure may cause



delayed restart of the engine, ("long crank") and/or rough idle after startup.



Production Solution



Not applicable.



Service



1. Bring engine to operating temperature and continue to hold the engine at 3,000 RPM for an additional 5 minutes, so that the engine is hot.



2. Observe MVB "fuel rail pressure, actual value" to determine rail pressure. Should be at ~35000hPa (~35 bar).



3. Turn engine off.



4. Monitor MVB "fuel rail pressure, actual value".



If the pressure decreases to ~25000 hPa (~25bar) within 10 minutes, remove the plugs and check possible fuel ingress in cylinder (or combustion



chamber.)



WARRANTY



REQUIRED PARTS AND TOOLS



ADDITIONAL INFORMATION



All parts and service references provided in this TSB are subject to change and/or removal. Always check with your Parts Department and service



manuals for the latest information.