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Section 6
CHECKING ENGINE PERFORMANCE
The Six-Gun/EconoMind Diesel
Tuner requires the engine coolant
temperature (ECT) to be above 120º
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.
When EGT Temperature Limit Kit/
Thermocouple installed, your Six-
Gun/EconoMind Diesel Tuner is
calibrated to maintain a maximum
EGT of 1350°F on levels 2-5 (2-6 with
EconoMind). 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.
⚠
CAUTION:
Level 6 EGT limit set at 1500º F.
If
you find that EGT remains high for any
length of time, check for boost leaks or
a dirty air filter.
-END, SECTION 6-