Idle Problem, IACV Faulty?


vtecsilver said:
useful info - thanks for posting. Just used the car after a few weeks sitting in the garage, and once it had warmed up it wouldn't idle - idle was only about 200rpm, and the engine kept cutting out, though when cold the idle wasn't as steady as normal, and if i held the revs at 1500 when it was warm, again the revs would climb and drop slightly. Car was only serviced 1st april as well :(. Will try cleaning the iacv as per above, and will report on whether it works.

Out of interest though - does anyone have the part number for the seal shown in the 3rd photo?
Click to expand...

36450-p6-s01 idle air control valve
36455-pt3-a01 iacv o ring
 
...im buying a new IACV. I replaced mine with a used one which worked for a short period of time, then started to idle and stall again. I cleaned my 2nd IACV and when I did, the idle and stalling stopped for a short time, then returned. I cleaned it a few times, and it always comes back. So I am replacing it next week.

Is there a way to delete the IACV completely?
 
im gonna try this 2mrw and i'll let ya know if it works..
she's idling at 500rpm past 2 days :angry2: . hav te sort it
 
done this today wit me mate and she seem's
to have done the trick :thanks:
 
common problem,i have it too,
i tried several solutions but didnt manage to fix it
 
I cleaned out my IACV in my 00 EK (D16Y8) and now the car idles very low (500rpm) when the engine is warm and idles at 1500rpm when the engine is cold. The car stalls out when stopping at lights and stop signs, if i'm in 4th gear and push the clutch in as i'm coming to a light the rpms drop and the car dies... any help would be greatly appreciated.

before cleaning out my IACV the car never did this, also there is no CEL.
 
Check all vacuum hose leaving intake manifold there is a good chance you might have knocked one off
 
So after looking at the service manual I followed the steps to troubleshoot the IACV,

1-started engine with no load and held the engine at 3000 rpm until the rad fan came on, then let it idle. the idle wasn't below 550rpm.
2- turned off the engine and removed the intake duct from the throttle body
3-started the engine and let it idle
4-placed finger in the hole of throttle body, once i did that the engine stalled out.

so I adjusted the idle speed with this procedure found on another forum:

1: bridge the 2 pin blue plug behind glove box (the diagnostic plug)run engine to as closes as possile to 500 rpm on idle (no load) by adjusting the butterfly.

2: turn off engine un plug idle control valve

3: with ingnition off remove the 7.5 amp back up fuse for ten seconds

4: plug idle control valve back in

5: repace 7.5 amp back up fuse

6: the idle control valve is now reset
thanks to ash-EK4 for these steps

I know its not the correct procedure to reset the idle speed but it seemed to have worked. I didn't even adjust the idle speed screw because i didn't know where it was at 1st (didn't read the haynes manual at the time)

Been driving around now and I haven't stalled ("crossed fingers") like i was stalling last night at every red light/turn/stop sign.

Here are the pics of my idle with no load


and now with load with lights and ac blasting and rear defrost


i'll update if the car stalls out in the future (i hope not :angry:). Hope this helps others.

Also getting the gasket for the IACV, its only 6 bucks, should i install it or wait ?

thanks for the help.
 
No harm to fit a new gasket. Idle speed looks fine in those photos:nice:
 
I just want to confirm if i should go ahead and clean the IACV:

When car is cold it idles at about 1,800 (pushing 2,000 sometimes) and when pulling away it doesnt sound very healthy. When the car is fully warmed up and it idles, it idles very low...touching 500rpm and sounds as though its about to stall (but doesnt) and then if i put my lights on full it makes the car idle at 900 - 1000 and sounds healthier. When the car is fully warmed up and i pull away, it sounds like the idle drops really quickly... IACV?
 
Hi guys, an old thread here but im going to bring it back to life lol. My ek9 when parked at say a red light will sometimes idle at 1100rpm (when fully warmed up) and other times wil sit at 900rpm as normal, am i right in saying this could be a clogged iacv?

Also my main and most annoying problem, sometimes when the engines warmed up and taking off in first gear the car response feels very 'lazy' and you have to push down on throttle more than usual to get even a half good takeoff!? Its really annoying and tbh if I ever need a quick start off the line its not going to happen unless im sitting at 4000rpm!

If anyone recognises these sympstoms, feel free to give your input!.

Cheers.
 
vag_to_jap said:
Hi guys, an old thread here but im going to bring it back to life lol. My ek9 when parked at say a red light will sometimes idle at 1100rpm (when fully warmed up) and other times wil sit at 900rpm as normal, am i right in saying this could be a clogged iacv?

Also my main and most annoying problem, sometimes when the engines warmed up and taking off in first gear the car response feels very 'lazy' and you have to push down on throttle more than usual to get even a half good takeoff!? Its really annoying and tbh if I ever need a quick start off the line its not going to happen unless im sitting at 4000rpm!

If anyone recognises these sympstoms, feel free to give your input!.

Cheers.
Click to expand...

If you have anything on which causes a high current draw on the electrical system(i,e blow heater, A/C, rear window demister etc) then the idle is bumped up so this could be your issue. I would check your ignition timing regarding the poor engine response but end of the day it is a 1.6 NA engine so never going to have bucket loads of low end torque like a diesel or big capacity petrol engine.
 
Vtec6000 said:
If you have anything on which causes a high current draw on the electrical system(i,e blow heater, A/C, rear window demister etc) then the idle is bumped up so this could be your issue. I would check your ignition timing regarding the poor engine response but end of the day it is a 1.6 NA engine so never going to have bucket loads of low end torque like a diesel or big capacity petrol engine.
Click to expand...

I think thats whats causing the idle as ive noticed when heatings off along with the rear demister it idles fine!.
Cheers for the help
 
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