Two jumpers need to be set inside the AEM EMS 30-1000. They are JPC1 and JPC3, and they correspond to B4 and B3. The left two pins are for direct fire and the right two pins are for stock ignition. I recommend that you send the EMS to AEM and have them do it. That way you don't void the warranty. Even if it's not under warranty, once that warranty sticker has been torn, they will automatically charge you $50 just to look at it if you ever send it in. They charge you because they have to go through and check everything. The reason I know this is because my EMS had two burnt coil drivers and had to be repaired.