AEM 30-71XX Infinity Stand-Alone Programmable Engine Mangement System Full Manual User Manual
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Tuning Guide
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© 2014 AEM Performance Electronics
Idle Stepper Max Steps:
The number of physical steps the stepper idle valve is capable of moving without hitting its
mechanical stop. See the Idle Setup: Stepper Idle Valves section of
.
Min value = 0, Max value = 300
Idle Airflow Invert:
Some idle air control motors have an inverse relationship between position and airflow. In other
words, 0% position results in maximum airflow and 100% position results in minimum airflow. If
working with this type of air control valve, turning on 'Idle Airflow Invert' will invert the final step in
the ECU's Idle calculations, 'Idle Position', so that vehicle's idle valve can work properly without
requiring changes to the the vehicle's wiring harness.
Idle_Decel
Units: Engine Speed Rate vs RPM vs Idle%
Description: This table allows an extra idle airflow offset to prevent the engine from stalling
when decelerating down to idle. When the engine is decelerating quickly, the lower-right cells in
this table will be used. These cells can be set to add airflow in order to slow the engine's
deceleration 'on the way down' which makes the engine less likely to stall. This is especially
helpful for vehicles with lightweight flywheels. Table values 300–800RPM above the target idle
speed are the most important ones to adjust; increasing idle position when the engine reaches
or drops below the target idle speed is generally too late.
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