i juss got finished with a jdm h22a swap into my 96 lude, lovin every minute of it, but when the engine warmed up i had an idle surge that kept jumpin from 700 rpms to 1400 rpms...i would turn on the AC and it would stop so i did some research and thought it was my IAC valve (idle air control) so i took that off and cleaned it with carb cleaner....it helped a little but it was still doin it. So my next step was to try the IAS (Idle air screw) its located right under the throttlebody on the passenger side i took a flathead and adjusted it clockwise and it brought my idle down to 900 rpms and never surged again...try it and let me know wus good....