Edelbrock Pro-Tuner, User Manual

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Advanced Tuning with the Pro Tuner System 181
normal operation.
Although the fuel injectors are characterized for the system, small variations occur
because of fuel rail dynamics (causing pressure pulses in the system), pressure delta
differences between cylinders, system wear, etc. Closed loop fuel adaptation is meant to
adjust for these inconsistencies. The system includes a single heated switching style
oxygen sensor. This will provide satisfactory closed loop operation and adaptation. For
closed loop operation over a greater range of air/fuel ratios, a single or dual "wideband"
style sensor may be used. These sensors may be selected through the setup wizard.
Large adapted values in the fuel flow compensation map generally indicate incorrect
system setup, injector characterization, or incorrect values in the VE or Base Fuel map:
which the system will try to overcome by increasing/decreasing the fuel adaptation
value. If it cannot adapt due to the base calibration in the VE or Base Fuel Map being too
far out, you will have to tune the base calibrations much closer before the adaptation will
be allowed to occur.
No tuning is required for the closed loop behavior or sensor operation, Although
the band of air/fuel ratios over which the system is allowed to go into closed
loop operation can be adjusted to suit the user in the "Equiv Ratio Delta Map".
The band is calibrated as a function of equivalence ratio. This map is pre
calibrated based upon the oxygen sensor choice made in the setup wizard, so no
calibration is usually necessary. This table should only be adjusted under certain
circumstances. For a full explanation of the Equiv Ratio Delta Map, see the Help
section on Additional maps
If desired, the tuner can see or manually adjust the fuel adaptive map by opening the
Closed Loop correction (CLC) map in the drop down list of maps on the "maps" page.
As stated earlier, the adapted values may be applied to the Base Fuel map and the CLC
map reset to its baseline if the values appear to be at their high or low limit. This
function is under the tools menu and can be invoked by the tuner in Alpha-N (speed/
throttle) or MAP-N (speed/pressure) modes.
*If a MAF sensor is used in Speed/Density mode, the MAF will adapt the VE (Volumetric
efficiency) map directly and the O2 fueling correction values will remain in the CLC map
and not be applicable to the VE map.*
Manual adjustments to this map will be over-written if closed loop is active. To
retain manually tuned Fuel Flow compensation in the CLC map, deselect oxygen
sensor in setup wizard and run open loop.
The "Toggle Closed Loop" function on the main dashboard can be used to manually
tune the fuel flow compensation to tune actual AFR to equal mapped AFR. The toggle
function will disable the O2 adaptation until button is toggled back.
The closed loop operation will only be active and adapting the compensation map under
certain conditions. This is to insure accurate adaptation. Note the closed loop indicator
will be lit when active. The closed loop adaptation is only active under steady state
running conditions. It will NOT be active under the following:
•
During warm up
•
During initial start until the sensor/s have been deemed "ready".
•
During any transient rpm or load condition
•
If the desired air/fuel ratio is outside of the sensor's capability. (In such cases, a
wideband UEGO sensor should be installed)
If continuous open loop operation is desired, simply select "None" for oxygen sensors in