Sorry for the noob question, just became a member today. Heres my problem. I have successfully swaped in a JDM d15b into my 92CX hatch. Im running a P28 ECU, headers, high-flow cat, and catback exhaust system, and a modified AEM short intake. I love the pull and power of it, but my gas went from around 300miles a tank to about 150? I was wondering if anybody else is experiencing this, or is there something that im doing wrong?. Thanks.