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Default Vacuum Advance: 5° (Typical Values 4° - 10°)
NOTE: It is recommended to check with your engine builder to determine what timing values are
best for your application.
When the engine is in cranking mode, the engine ignition timing will default to 12° BTDC until the
engine RPM exceeds 300 RPM.
Idle Spark – This is the amount of advance the engine will have during idle, it will maintain this
value until engine RPM exceeds the Advance Start RPM value.
Advance Start RPM – This is the RPM value that the ignition curve will start calculating advance to
the Total Spark value at the indicated Total Spark RPM.
Total Spark – This is the maximum amount of advance the engine will have at the Total Spark
RPM value. The advance will maintain this value unless partial throttle conditions create enough
vacuum to calculate vacuum advance values.
Total Spark RPM – This is the RPM the Total Spark value will be met. The advance curve is calculated
from the Advance Start RPM value to the Total Spark RPM value.
Vacuum Advance – This value is the maximum amount of additional advance added to the Total
Spark value under vacuum conditions.
Self-Learn Idle Tuning
If idle quality is not performing as expected, some adjustment to the idle setup may help. All
adjustments should be performed at operating temperature only (170° F).
• If idle quality is excessively poor, first try resetting the self-learn from the ECU Settings page.
• Verify the idle setup procedure has been followed as outlined in the Pro-Flo 3 installation
instructions. Verify that the Idle Speed Screw has been set properly. If set correctly, the
system should be idling at the intended Idle Target value with an IAC% value.
• The self-learn may require the idle speed be increased slowly above the desired idle speed for
a few moments to adjust fuel calibration. This can be achieved by increasing the idle target in
the Advance Tuning section. Increase the idle target to 1500 RPM in slow steps, observe the
AFR Corr % allowing time for adjustment. When complete, return the setpoint to the desired
Idle Speed Target.
Adjusting Fuel Modifiers
Most applications will not require adjustments to the Fuel Modifiers. This feature has been
provided to manually adjust the base fuel map in different sections to reduce self-learn functions
when necessary.
• The vehicle should be driven for adequate time to allow for normal self-learn corrections to be
applied before making any adjustments to the Fuel Modifiers.
• The engine must be at operating temperature before any adjustments to the Fuel Modifiers.
The Fuel Modifier menu provides indicators that illuminate to indicate the different load points of
the base fuel calibration that are currently being calculated while driving.
The AFR Correction % indicates the amount of Closed Loop Correction currently applied.
EDELBROCK E-TUNER TUNING:
8
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