AEM 30-6905 Universal Programmable EMS-4 - Manual (Page 158)

Page 158 of 279 EMS-4 Install and Tuning Guide_Rev 1.6
3,000RPM.

Start the engine.

After a few seconds, confirm that the Idle Target parameter is 3,000RPM (if
not zero-out all.

Add or subtract idle percent from the Idle% vs Target Table until the Idle
Learned Value parameter is 0% (you may notice that the idle motor will not
rev the engine this high but that is common).

Drop the Idle Target Base table to 2900RPM.

Add or subtract idle percent from the Idle% vs Target Table until the Idle
Learned Value parameter is 0%.

Drop the Idle Target Base table to 2800RPM.

Repeat this process for every 100RPMs until 500RPM is reached.

Set the Idle Target Base table to your desired values.
It is a good idea to set the Idle FB Minimum option to a small feedback percentage to keep the
engine from stalling (5% is typical). The Idle FB Maximum can be set high to band aid tuning
flaws (15% is typical). The Idle FB Dead Band- option is typically set at -25RPM while the Idle
FB Dead Band+ is typically set at +50RPM to keep the idle steady. A typical Idle FB Below
rpm is 1700 which keeps the idle motor from trying to idle at slow vehicle speeds. Set both Idle
On If TP Less and Idle Off If TP Over options 1% higher than the Throttle parameter when the
engine is running and the throttle is at rest.
Fuel Tuning
The Fuel Map is the main fueling table in the calibration.