AEM 30-6905 Universal Programmable EMS-4 - Manual (Page 179)

Page 179 of 279 EMS-4 Install and Tuning Guide_Rev 1.6
This table gives a % accel pump size, versus the dTPS value. This % size is relative to the
current injector pulsewidth (PW). So if the current PW is 1,400 uS (1.4mS) and the % value was
75%, the base accel pump size would be 75% * 1.4mS = 1.05mS.
Once a base accel pump size is generated, it is immediately multiplied by the Accel vs
Throttle table. This is a TPS based table and serves to scale the output based on the throttle
position when the accel pump was activated. This table usually starts at 100% and decreases
to 0% at high throttle value. This yields an accel pump value that varies by throttle angle and is
usually large for throttle movements near closed throttle and small for throttle movements near
WOT.