Just put on 65 mm throttle body and c&l 73mm mass air for stock 19lb injectors. Got it running, set idle to 850ish, then TPS, and went for a drive after it warmed up a bit. Runs great, but when I come to a stop sign etc., the idle hangs at like 12-1500 rpms for a few seconds before it drops down. I cleaned out the IAB and all, what's up??