What happens if the idle control valve on a 2000 honda accord is not immediately replaced?

idle control valve
clean or replace

Cleaning 2000 Honda Accord Dirty Idle Air Control Valve MP4

How To Clean Your IACV Idle Air Control Valve Honda Tech

could be a vacuum leak check all your vacuums see if you hear any air

First check the connector and wiring. If good, remove the idle air control valve and clean the passages as well as the valve and seat. Reconnect the valve but don't install. Have someone start the car while you plug the downstream passage. The car sould idle down or stall, and the valve should retract. Remove your finger, and the valve should extend. If the car will not idle down with the passage plugged, you have a vacuum leak. If the valvedoes not react properly, check continuity of the wires to the ecu.

What usually is the culprit with these models is the Idle Air Control valve. (IAC) Its located around the intake and throttle body ..Often these get clogged up.. I have removed and cleaned many and replaced a few as well...Also It can be your fast idle valve too depending what else its doing like idle fluctuation at stops in neutral , cold , or hot and what not ..A little more info may help but this is where in my opinion is the best bet to start..Common on the 90-93 accords...Here is a pic so you can see what Im talking about...The IAC is circled red and Fast Idle valve in yellow ...good luck .. and Hope this helps a little. Let me know what happens when or if you fix it..Thanks :)

Replace the Throttle Position Sensor.

check for broken or disconnected vacuum hose/line
also check for the fast idle sped control valve for defect

may be the idle speed control valve, but first check all the vacuum lines

i'm really not familiar with the older hondas but if you've got an idle air control valve yours is a common symptom of a faulty idle air control valve. check the wiring to it and make sure the connector is clean and tight. if the wiring and connector is good i'd recommend replacing the iac valve.

usually idle that goes up and down is cause by a bad "idle control valve" located near the throttle body. Needs to be replace.

there is no manual adjustment all handle by ecu it should be near throttle