Owners manual

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Warm Duty cycle – Amount of fuel to add when warm engine temperature transition occurs.
Cold Duty cycle – Amount of fuel to add when engine temperature is cold.
Warm/Cold Transition – Temperature value to determine if engine is warm or cold.
Other
Cylinders – Drop down menu to select number of cylinders.
Fuel Type – Drop down menu to select type of fuel being used. A custom fuel type setting is available.
Stoichiometric Ratio – Ideal air fuel ratio for selected fuel. If custom fuel setting is selected under fuel type, the
stoichiometric ratio must be input.
First Start Active – Check box to enable or disable the First Start Parameter (Cold Start).
2nd Injector Active – Check box to enable or disable the 2nd injector.
Note – 2nd injector only available on part number 20-0003 for Holley
®
4500 carburetors.
Advanced Mode – Check box to enable or disable the Advanced Features.
• You can adjust the Proportional Coecient until the motor responds but is not too rich or trying to stall.
• It is recommended to start with the default values for the Integral and Derivative Coecients (0.3).
• You can adjust the Integral Coecient over time if the motor still needs more fuel which may be the case
when the motor is under load.
• If a quick shot of fuel is needed, increase the Derivative Coecient.
• It is recommended to make changes in this order:
-Adjust Proportional Coecient until a substantial change is noted.
-Adjust Integral Coecient over time if it will not reach target Air Fuel Ratio.
-Last adjust the Derivative Coecient if the ECI is slow to respond.
-Slight tweaks to the Proportional Coecient may be needed as Integral and Derivative
Coecients are changed.
Stoichiometric Air-Fuel Ratios
• Gasoline: 14.7
• Ethanol: 9
• Methanol: 6.4
• E85: 9.8
PROGRAMING
HELPFUL TIPS
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5/01/18