Civic EG

What is happening? Usually happen in the morning after the first start of the day. Thereafter, when engine warm up after 30 mins, it return back to normal.

what is it doing? is it a constant hunting? does it just surge every once in a while?

need some more info

vincsk2003 wrote:What is happening? Usually happen in the morning after the first start of the day. Thereafter, when engine warm up after 30 mins, it return back to normal.

it could be many things u need to give more info

more info would help but could be iacv

There needs to be one allmighty sticky thread on pulsing idles
This seems to be extremely common

The things it could be:
Air in your coolant system
Vacuum leek
Clogged IACV
most likely the FITV

Theres probably more reasons for haunting idle
http://civic-eg.com/viewtopic.php?t=194 ... light=idle
http://civic-eg.com/viewtopic.php?t=192 ... light=idle
http://civic-eg.com/viewtopic.php?t=192 ... light=idle
http://civic-eg.com/viewtopic.php?t=184 ... light=idle

If you can get under the hood
Remove your FITV and IACV
Loosly tighten screw inside FITV and clean IACV
Put both valves back on
Then bleed your coolant

if the PCV valve fails it can do that also, it happend to me once with my ex-prelude

i have the same problem, not trying to thread jack, but my idle hunts from 1000-2000 at idle only when i tap the throttle once. if i start it up cold it will idle high, and then it'll hunt when i press the gas. its weird it wont hunt if i dont touch the gas pedal.

foxgearshift wrote:if the PCV valve fails it can do that also, it happend to me once with my ex-prelude

before i had my pcv valve replaced(my old one broke) my hunting idle stayed the same even after warm, after replacing it with a new one, the hunting idle goes away when warm, but didnt fix it when cold.

btw i have a b16 with no FITV.

u should try to replace ur PCV first but be careful those things are a bitch to remove if it breaks on u

LaosToaster wrote:

foxgearshift wrote:if the PCV valve fails it can do that also, it happend to me once with my ex-prelude

before i had my pcv valve replaced(my old one broke) my hunting idle stayed the same even after warm, after replacing it with a new one, the hunting idle goes away when warm, but didnt fix it when cold.

btw i have a b16 with no FITV.

u should try to replace ur PCV first but be careful those things are a bitch to remove if it breaks on u

i remember once i had a problem with FITV,IACV and PCV and am telling u they all can make idle problem try to take the IACV,FITV and clean them, in my case when i had FITV problem it just needed to be cleaned.
check those link's they will help u http://www.ozhonda.com/forum/showthread ... tment-B16a

http://www.zerotohundred.com/newforums/ ... aning.html