Idle from Hell.... Done everything still loopy idle?

[Laviathan222]

Ok... so i'm at a loss here, i've done everything, Bled my cooling system, twice. Cleaned original Iacv then replaced the iacv with one from a junkyard. Tightened FITV, Blocked off the secondary useless cold air idle thingy (on the right side of intake) sprayed carb cleaner all over the engine and no vacuum leaks... and it's still there, The car does not idle like this until i drive it, and it really tries not to honda idle. it seems like the car doesnt want to honda idle but somethings forcing it too... it's really weird, i have a video to best describe my situation... please help i'm selling car and i dont want someone to think it's a turd cause of this issue lol What else can i check for and or do?

http://s901.beta.photobucket.com/use...003-1.mp4.html

[Laviathan222]

I'm going to try blocking off my FITV and see if that helps, just read it on another read that maybe the FITV could be bad... we'll see if that helps any

[H311RA151N]

I would suspect the IACV is what’s giving you this problem. You might have got a bad part from the JY.

[Laviathan222]

Yeah it appears as if, for shits n giggles i unplugged the iacv and it went away, damn jy...

[H311RA151N]

Yeah, I suggested it because that happened to me with my H23IM.

[Laviathan222]

Well a note to future people, unplug iacv if it stops there's your problem... haha

[reklipz]

Well a note to future people, unplug iacv if it stops there's your problem... haha

Wait... wouldn't this imply that the IACV is working properly?

The IACV is just a motor that "jiggles" open and closed an air valve in sync with the electronic control. Give power to the motor and the valve opens, remove power and it closes. Do this in rapid succession and you can effectively control the ratio of time open to time closed. This is in principle how the IACV works.

If you unplug the wire, the valve stays closed, idle drops. This means, at least on the surface, that the valve is working as expected.

Do you get a code 14 from the ECU when you unplug the IACV? I'm wondering if perhaps some other sensor/signal is bad, causing the ECU to compensate via the IACV.

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I'm not suggesting that either of you two are incorrect, I simply don't see how this diagnoses leads to replacing the IACV. I'm trying to understand how, is all. For science! And my understanding. And hopefully others' as well.