I just got my car running after my recent mods. I just put gt40p heads and headers, trick flow track heat intake, 70mm tb, and e303. I got everything back together and got it running pretty good. The only problem is when I try to lower the idle, it will run beautifully until the idle dips below 900 rpm and then surges till it stalls. I was having bad idle and surging issues and I replaced IAC, ect, and air charge sensor. These all helped tremendously but I can't get over this last hump of making it idle below 900. Thanks, Casey.