Idle Problem
 

Ok so i got a d15b and when i start the car it idles at 3000 till it gets worm the it idles at 1500 then back to 3, 15 then back to 3 ive tried multiple things ive tryed the idle control valve i also cleaned it and ive checked for vac leaks also timin so iam kinda getting mad can anyone help me PLEASE thank u.

That sounds so much like a vac leak.
You've check everywhere possible?

Ive checked almost all i can think of i even changed pcv and the hoses for that.

I found the following from another forum, this guy has the same engine and same problem your having:
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"I thought it was the IACV, I replaced it, and it didn't fix ****.

Ran a diagnostic. It was something starting with my IACV, going through the sensors, to the wires, to the ECU.

Found a buddy with a 98 DX 5SPD, just a hatch, not like my 2dr :) popped in his ECU, idle was perfect.

I'd really recommend at least trying someone elses ECU it takes literally 2 seconds, and it fixed my problem after months of trouble shooting. "
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Why don't you find a stock ECU and swap it. It might actually work.

Ok ill have try that next but i also heard it could be a FITV but i dont no wat that is lol

Ok i tried the ecu thing that wasent it can ANYONE help ill take any help at this point its just so annoying.

def check the fitv.. its located under the TB check honda tech for a write up there is a good one there..

for future knowledge idle issues that are caused by the IACV will only effect the car once its at running temp.