Detroit Diesel MBE 4000 Service Manual page 298

2.12 FUEL SYSTEM INSPECTION
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To avoid injury when working near or on an operating
engine, remove loose items of clothing and jewelry. Tie
back or contain long hair that could be caught in any
moving part causing injury.
Diesel engine exhaust and some of its constituents are
known to the State of California to cause cancer, birth
defects, and other reproductive harm.
Always start and operate an engine in a well ventilated
area.
If operating an engine in an enclosed area, vent the
exhaust to the outside.
Do not modify or tamper with the exhaust system or
emission control system.
NOTE:
Before running the test, warm the engine to normal operating temperatures: 80 -95 C
(176 -203 F).
1. Plug your minidiag2 into the truck diagnostic connector and follow the instructions in the
minidiag2 Supplement Manual to connect to the VCU/DDEC-ECU system.
2. After establishing the connection with the truck, choose option 4 – Routines.
3. Under Routines section, select option 4 – Idle Smoothly Balance.
4. Check each cylinder value for this routine and compare your results with
the troubleshooting and proceed as described for any results out of spec.
Refer to section 2.12.2.1.
5. Still connected to truck, look for option 5 – Impact Time Delay, under the Routines section.
6. Select it and check each cylinder value for this routine and compare your results with the
troubleshooting and proceed as described for results out of spec.
2.12.2.1 Idle Smoothly Balance Troubleshooting
This test measures the percentage of fuel delivery for each cylinder in order to maintain a smooth
operation at idle. Operational range for this test: from -3% (negative) to 3% (positive).
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PERSONAL INJURY
PERSONAL INJURY
6SE412 0403 Copyright © 2004 DETROIT DIESEL CORPORATION
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All information subject to change without notice.
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