Engine - Runs Rough/MIL ON/Misfire DTC's Set
01 08 092014923/2
November 19, 2008.
Supersedes Technical Service Bulletin Group 01 number 07-15 dated April 30, 2007 for reasons listed below.
Affected Vehicles
01 MIL on - misfire DTC stored after cold start
Condition
Sporadically, the engine may run slightly rough for a few seconds after cold start. The MIL may illuminate with a DTC for misfire on one cylinder only (P0301, P0302, P0303, P0304, P0305 or P0306) stored in the ECM data memory. The rough running condition disappears a few seconds after cold start and does not exist with a warm engine.
Technical Background
Not applicable.
Production Solution
Not applicable.
Service
1. For 3.2FSI only:
Ensure that TPL 2010890 - Cold engine runs rough or stumbles; warm engine may stall when engaging gear and vehicle is stationary has been performed.
2. Follow normal Guided Fault Finding Diagnosis, for example:
- Swap spark plugs and ignition coils between affected cylinder(s) and good cylinder(s).
- Check compression and leak-down of affected cylinder(s).
- Verify fuel quality. (Also refer to TPL 2014753 - Gasoline quality.)
- Swap fuel injectors between affected cylinder(s) and good cylinder(s).
NOTE:
When swapping fuel injectors, always replace all fuel injector seals.
3. If diagnosis results are inconclusive and the condition persists, replace all hydraulic equalizing elements (lifters) of the affected exhaust side.
(4 cylinder engine: 8 hydraulic lifters. 6 cylinder engine: 6 hydraulic lifters of the affected cylinder bank.)
Warranty
Required Parts and Tools
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.