Banks Power 2001-2004 (LB7) Chevy_GMC 6.6L Duramax Turbo-Diesel Pickups - Manual (Page 14)

Go over the entire installation as a
precautionary check to ensure that
all clamps are tight, wiring and hoses
are properly routed, and connections
are tight.
Observe the operation of the
boost and pyrometer gauges while
driving under varying conditions.
Turbocharger boost pressure will
increase as a function of load and
engine RPM, thus the engine will
produce little boost while cruising
at light throttle, with maximum
boost while climbing hills heavily
loaded during acceleration. Note
the boost level seen during hard
acceleration with a given load.
If performance seems to have
deteriorated sometime in the future,
the maximum boost figures may
be compared to see if boost has
dropped off. Lower boost may be
caused by turbo ducting leaks,
a malfunctioning wastegate or
dirty air filter. Typical maximum
boost pressure settings for the GM
Duramax diesel will vary considerably
with stick or automatic transmission
options, year model
of vehicle and altitude.
Use your pyrometer gauge to
monitor exhaust gas temperature
(EGT) in the engine. At idle, exhaust
gas temperature will be very low,
perhaps only 300°F. As the engine
is accelerated for higher speeds
with greater loads, the EGT will
rise. The highest EGT will be seen
under maximum load at full throttle,
such as climbing a steep grade
with a heavily laden vehicle. Your
pyrometer is color coded to assist in
your reading of the gauge. The red
zone indicates a dangerous level of
temperature. Your engine should
not operate in this range for more
than a few seconds. The blue zone
indicates when it is safe to shut the
engine off. To avoid heat damage
to various engine components it
is recommended that the exhaust
gases cool below 400º before the
engine is shut down.
Your OttoMind is calibrated to
maintain a maximum EGT of 1350°F.
You may experience brief excursions
slightly above 1350°F under accel-
eration. If you find that EGT remains
high for any length of time, check
for boost leaks or a dirty air filter.
-END, SEcTION 8-
If you feel that your OttoMind is
not functioning properly, some
diagnostics can be performed.
Remove the lower dash panel and
observe the two LED’s mounted
on the programming port. When
the OttoMind is on the green LED
will illuminate. If the red LED is
on or blinking contact Gale Banks
Engineering Tech Support at (888)
839-5600. If the LED’s cannot be
viewed with the OttoMind installed,
remove the OttoMind by separating
the hook and loop interlocking
fasteners and gently pulling the
OttoMind down to view the LED’s. Do
not disconnect any of the harnesses
and be careful to not strain the
harnesses by pulling on the OttoMind.
If the OttoMind should ever need to
be removed from the vehicle, the
system includes a by-pass plug that
must be connected to the white 8-
pin connector (next to the 10-pin
connector) in place of the OttoMind.
Failure to utilize the by-pass plug will
result in a “Check Engine” light on
the dash and a Diagnostic Trouble
code being stored in the factory
computer and the engine will not start.
-END, SEcTION 9-
Section 9
TRouBLeSHooTING
Section 8
CHeCKING eNGINe PeRFoRMANCe
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