AEM 30-6905 Universal Programmable EMS-4 User Manual
Page 138
Page 138 of 279 EMS-4 Install and Tuning Guide_Rev 1.6
amount of fuel that matches the maximum fuel pump output. The filter is always located after
the fuel pump, however it does not matter if it is positioned in the front or rear of the vehicle (we
prefer to put it toward the front for easy serviceability). AEM carries fuel filters for high-powered
engines, which use an easy to find, high volume, replaceable element.
It is imperative that a pre-filter be mounted to the fuel pick up in the tank. These filters are very
high volume and create very little pressure drop. The use of a pre-filter ensures long fuel pump
life and can eliminate low flow conditions caused by debris entering the pump inlet.
The final link in the fuel delivery system is the fuel rail. The fuel rail should be consistent with, or
larger than, the hose size. The additional capacity of a large-diameter fuel rail helps to dampen
the pulsations created by the fuel injectors and ensures even fuel delivery under all conditions.