i found an intermittent connection on the rear sensor at the front of my engine. the one with two separate wires. don't know what it does but soldering the wire directly to the pin changed my x11-3 duty cycle from 79 to jumping between 52 and 28 percent. this lowered the idle speed but it still gets lower with air cond and drive/reverse. i think i have made a step forward but i'm not home yet! any ideas?