User guide

96815 v.3.0 25
The Six-Gun Diesel Tuner requires the
engine coolant temperature (ECT) to
be above 110º before it will add fuel.
If the optional Banks iQ or DynaFact
®
gauges are installed, observe the
operation of the boost and pyrometer
(EGT) gauge values 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 fuel
injection pump, or dirty air filter. Typical
maximum boost pressure settings
will vary considerably with stick or
automatic transmission options, year
model of vehicle and altitude. Note:
Before key-off, check tuner for error
codes.
Use your Banks iQ or EGT 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.
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 Six-Gun Diesel Tuner is
calibrated to maintain a maximum
EGT of 1350°F. You may experience
brief excursions slightly above 1350°F
under acceleration. This is normal and
EGT should return to 1350°F or below
within a few seconds. If you find that
EGT remains high for any length of
time, check for boost leaks or a dirty
air filter.
-END, SECTION 6-
Section 6
CHECKING ENGINE PERFORMANCE