AEM 30-6905 Universal Programmable EMS-4 - Manual (Page 196)

Page 196 of 279 EMS-4 Install and Tuning Guide_Rev 1.6
The Ign vs Idle RPM table is used to trim ignition timing vs Idle Target Error.
Ignition Trim Channels
Ign Map - Displays the current ignition timing from the Ignition Map
Ign Trim AIT - Displays the current ignition timing correction for air temperature from the Air
Temp Ign Trim table