MBE 4000 SERVICE MANUAL sure they are the problem! It is unlikely a component will fail again following a recent replacement. 3. If other vehicle devices are affected, this indicates there may be something wrong with the ignition wiring. 4. Operate the engine under similar load and temperature conditions. Check the fuel system for restrictions, fuel filter, and fuel tanks for foreign objects blocking the fuel supply. Also, check the air system. Utilize the DDDL snapshot feature. 5. Operate the engine at this temperature while attempting to duplicate the problem. Use the DDDL snapshot feature. 6.
It may not be possible to duplicate the fault or problem unless you can operate the unit in a similar environment. You may want to talk to the Customer Support Center, or a dealer in that area. They may have helpful experience. 7. If possible, troubleshoot the problem in a similar temperature range. 8. If the problem seems to occur during or after the engine is subjected to rain/spray washing, thoroughly inspect the connectors for moisture entry. 9. If the problem occurs at a specific vehicle speed, check the parameters affecting vehicle speed to verify they are programmed close to the vehicle speed where the problem occurs.
Check vehicle speed and watch DDDL (snapshot) for changes to see if the pulse wheel (VSS signal) is loose. 10. If the problem occurs at a specific engine rpm, unplug the oil, coolant, and air temperature sensors, and note any changes to the problem. Gather this data and contact the DDC Customer Support Center at 313-592-5800. All information subject to change without notice. (Rev. 2007) 6SE412 0702 Copyright © 2007 DETROIT DIESEL CORPORATION From Bulletin 1–MBE 4000–07 17-9