AEM 30-6905 Universal Programmable EMS-4 - Manual (Page 168)

Page 168 of 279 EMS-4 Install and Tuning Guide_Rev 1.6
secondary or staged injectors. These tables compensate for the variable opening time that
results from changes in battery voltage. These tables must be developed with proper
equipment and AEM has many injectors pre-configured for you in the setup wizard as shown
below:
If you can‟t find your particular injector in the list, contact AEM to have a flow test performed
using your injectors.
WARNING! EMS-4 SYSTEMS WILL NOT DRIVE LOW IMPEDANCE INJECTORS
DIRECTLY. A RESISTOR BOX OR PEAK AND HOLD DRIVER MUST BE USED.
CONNECTING AN EMS-4 DIRECTLY TO LOW IMPEDANCE INJECTORS MAY CAUSE
DAMAGE TO THE EMS.
THE FOLLOWING SCHEMATIC ILLUSTRATES AN INSTALLATION USING THE AEM 30-
2700 PEAK & HOLD DRIVER MODULE.