I have an idle problem that is very difficult for me to figure out. Car is an '03 Cobra with a Whipple Crusher, 80lb injectors/return system, and ported heads w/ Comp "stage 2" blower cams. I have the idle set at 750 rpm, and I'm assuming that isn't too low. While the car is idling, it has a weird issue where the idle will drop to around 600 rpm every 20 seconds or so. My data logs show the ISC duty cycle instantly dropping by at least 10% when that happens. Then it'll slowly pick itself back up, before doing the same thing. I've tried adjusting the throttle blade position with the IAC and TPS unplugged, only seems to make it worse. I can't ever get the duty cycle to the 30% or so that everyone says is ideal. My integrator will slowly wander up and down, which i don't understand. The car often has trouble starting or will stall after firing up. Also, the spark source is always at minimum clip while idling, not sure why that is. My datalog is linked.