Yes, I killed this post just like I killed the last one.
Long story short: I've have my IACV unplugged because it's stuck open. Jared sent me a free one. I will replace it and hope for a solution. Think that I will get some better mileage with it fixed? I dunno about idle air fuel mixing!
i would think it would help your mpg to replace it, useless revving definitely wastes gas, but as far as unplugging it... i dont know if that throws your car into limp mode. i know the iacv has a wire in common with many other sensors and the injectors.... maybe it messes with the voltages? who knows. either way your best of without the bad idle and without the cel.
don't waste your time or time will waste you
I don't really think you'll be seeing much difference in MPG. Like the idle screw, such a small amount of air passes through it that once the throttle plate cracks open, it's effect is reduced to almost nothing. You will idle a little smoother, but since MPG while stationary is already zero, that's not an improvement!
I had a bad IACV a while ago. Just took it off and sprayed the crap out of it with throttle body cleaner. Seems to be working fine now, nice and steady idle.
Scouring the country for an excellent condition Civic VX
The IACV problem still exists, even after swapping it. Next plan is to go ahead and wire it directly from the ecu to the iacv, outside of the car and all, and see if it works. Otherwise I'll just have to chalk it up to I don't have a clueville. I really want it fixed though.