6 PERFORMANCE DIAGNOSTICS 245
Figure 316 KOER IDT I6 .ssn
1. While engine is running, open D_KOER_ IDT_
I6.ssn to monitor engine operation.
Figure 317 Injector Disable Tests
2. Select Diagnostics from menu bar.
3. Select I6 Injector Disable Test from drop down
menu.
NOTE: The EOT indicator will change from red
to green when engine temperature reaches 70 °C
(158°F)orhigher.
• If the EOT indicator is red, erroneous
comparisons are likely from cylinder to
cylinder.
However, when diagnosing a cold misfire, a
technician can listen to tone changes from
cylinder-to-cylinder.
• When the EOT indicator is green and the
engine temperature is 70 °C (158 °F) or
higher, fuel rate and timing are more s table,
making compariso ns from cylind e r to cylinder
more accurate. Overall engine operation is
more stable.
4. Select Auto Run.
NOTE: While ru nning the engine, listen for sound
variations from cylinder to cylinder.
NOTE: If any injectors are removed and
reinstalled or replaced, test drive vehicle for
20 miles before checking for misfire or roug h idle.
Figure 318 I6 Injector Disable Test Results
(Auto Run – Text View)
EGES-270-1
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
Follow all warnings, cautions, and notes.
©August 2008 Navistar, Inc.
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