Fuel System - Long Warm Engine Crank Time
01 Long crank, engine at operating temperature24 10 31
2020891/2
June 14, 2010
Supersedes Technical Service Bulletin Group 24 number 09-15 dated July 22, 2009 for reasons listed below.
Affected Vehicles
Condition
^ Extended cranking time when engine is hot.
^ 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. Condition may cause the air fuel mixture to be too rich, causing a delayed restart of the engine or "long crank."
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. Record MVB 140 to determine rail pressure. Should be at ~35 bar.
3. Turn engine off.
4. Monitor MVB 140.
If the pressure decreases to 25 bar within 10 minutes, remove the plugs and check to determine which injector is leaking fuel into the cylinder.
5. Replace leaking injector(s).
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.