I know this is way off topic, but.... I'm having some issues with a surging idle. Now I have thrown a code for the IACV, code 14, IAC Valve (Idle Air Control) defective circuit or unplugged / defective sensor.

This problem started at Expo, after my sessions I'd have the surging idle, and very low idle. Turning off the car and turning it back on the problem went away. Never through a code at expo, but did on the way home.

Car has been sitting in the garage since I've gotten home, waiting on some parts before I start to play with it.

Thing to be done....

Check IACV
Clean IACV, possibly buy a new one LEN, CANT SEEM TO FIND IT ON YOUR SITE
Complete coolant flush
New hoses
New t-stat
Figure out a way to test IACV

Has anyone ever had this problem? How'd joo fix it?

The suspect....

 

I know I know......I look huge in the car!

<looing to buy seats and rails ..I..

 

hey jim, you can start by unbolting the IACV (but keep the coolant lines attached to it) and spraying it out really well with some brake cleaner. a lot of times carbon builds up inside and prevents the diaphragm from working properly. if that doesnt work or the unit looks nice and clean to begin with, i'd say just swap it out with a known good one. this is not an ITR specific part (or even integra specific) any obd2 honda should be compatible.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JOHN WAYNE &raquo;</TD></TR><TR><TD CLASS="quote">hey jim, you can start by unbolting the IACV (but keep the coolant lines attached to it) and spraying it out really well with some brake cleaner. a lot of times carbon builds up inside and prevents the diaphragm from working properly. if that doesnt work or the unit looks nice and clean to begin with, i'd say just swap it out with a known good one. this is not an ITR specific part (or even integra specific) any obd2 honda should be compatible. </TD></TR></TABLE>

Thats what I thought, man... Thats where I'll start, I was looking at hondaautomotiveparts.com and they are selling the 99-00 SI iacv for 133$. I was just doing some research and people were saying that sometimes its not the IACV. Anyone ever heard of ways to check the IACV?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by i. &raquo;</TD></TR><TR><TD CLASS="quote">Because this seems to be a common problem with civics, especially EK's and EM1's.
I didnt realize it happened so much until it happened to me, an only then i noticed the ridiclous amount of posts like 'idle acting up, IACv, etc'


First off, the code you're getting (P0505) same as CEL 14, is not IACv like how it says in the FAQ's stickied in here, Club Si, etc...
P0505/Code 14 is <U>Idle Control SYSTEM malfunction</U>, not IACv.

Possible Causes:

-IACvalve mechanical malfunction
-Throttle body clogged port, improper adjustment
-Intake manifold gasket leakage
-Intake airhose loose leakage
-Vacuum leak
-ECT sensor incorrect output
-Throttle Posistion Sensor incorrect output
(for the TPS incorrect output, this might be only for motors made in '96)

Try an check these things.

Start the motor, hold rpms at 3000 until the radiator fan comes on, then let it idle.
Check TPS, with the throttle fully closed, the TPS should be around 10%
(coolant temp should be around 200 degrees, give or take 5 degress or so.)

if your idle is above 550, check for vacuum leaks. Take the intake off, put your finger over the lower port in the throttle body. if the idle doesnt drop, check for vacuum leaks, make sure the throttle valve is closed completely.
if the idle does drop, adjust the idle speed. if you cannot adjust, replace IACv.

if the idle is less than 550, do the following:
disconnect the connector from the IACv.
(for A/T, d167y) if the engine speed doesnt increase, replace IACv. if it dies increase, adjust the (base) idle speed, clean the ports in the throttle body as necessary.

(for B16A2, d16y5,y8)if the engine speed drops or stalls, adjust the (base) idle speed, clean the ports in the throttle body as necessary. if the engine speed doesnt drop, or doesnt stall, replace IACv.

</TD></TR></TABLE>

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by walker111 &raquo;</TD></TR><TR><TD CLASS="quote">

Thats what I thought, man... Thats where I'll start, I was looking at hondaautomotiveparts.com and they are selling the 99-00 SI iacv for 133$. I was just doing some research and people were saying that sometimes its not the IACV. Anyone ever heard of ways to check the IACV?</TD></TR></TABLE>

try this from the helms...

http://autumnatic.org/IACV/IACV-1.pdf

 

You need Tech?

 

Told you to pull off and spray with brake cleaner at the track... have you not even done that yet?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Dave_B &raquo;</TD></TR><TR><TD CLASS="quote">Told you to pull off and spray with brake cleaner at the track... have you not even done that yet?</TD></TR></TABLE>

lol the car hasnt moved from the position I left it when i came home from VIR.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by KOALA YUMMIES &raquo;</TD></TR><TR><TD CLASS="quote">Hey Jim. I have been having a similar problem since I did my swap, during it I cleaned out the IACV to the specs of most of the threads on here about it, and ever since I occasionally get a fluctuating idle. It goes up and down a few hundred RPMs on its own and sometimes just sits higher or lower than the normal idle.

I havent thrown a code or CEL for it yet, but I'm going to go through that list and see if it helps my problem too. If you end up wanting to try a different IACV my friend has a whole box of them at his place, I havent tried replacing mine yet since it appears to be working sometimes still, and like your caR mine hasnt moved since Expo. </TD></TR></TABLE>

Right on. I'm waiting for some radiator hoses and stuff to come in so I can start the work on it.... I'll prob tinker with it this weekend.

 

same thing happend to me at expo slid off on my last event and when i went to go pit in the idle was all over the place i took it off and sprayed it with brake cleaner and no problems again

 

Remove IACV.

Cut blockoff plate from steel, drill holes for bolts.

Install plate and IACV.

Do not run coolant lines to IACV.

Connect IACV connector so you won't throw a CEL, or delete the IACV function if your EMS supports that.

IACV's are teh ghey.

 

i sell ported IACV as well. let me know if you wanna crack off vtak at idle.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RTW DC2R &raquo;</TD></TR><TR><TD CLASS="quote">i sell ported IACV as well. let me know if you wanna crack off vtak at idle. </TD></TR></TABLE>
Aww Snap!!! You know what to do.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RTW DC2R &raquo;</TD></TR><TR><TD CLASS="quote">i sell ported IACV as well. let me know if you wanna crack off vtak at idle. </TD></TR></TABLE>

quoted again because of sig worthiness

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Aquafina &raquo;</TD></TR><TR><TD CLASS="quote">Remove IACV.

Cut blockoff plate from steel, drill holes for bolts.

Install plate and IACV.

Do not run coolant lines to IACV.

Connect IACV connector so you won't throw a CEL, or delete the IACV function if your EMS supports that.

IACV's are teh ghey.</TD></TR></TABLE>

would this really work? i have cleaned my iacv like 3-4 times already and i get a CEL everyday. luckily i have a scanguage that can clear the code on the fly...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Aquafina &raquo;</TD></TR><TR><TD CLASS="quote">Remove IACV.

Cut blockoff plate from steel, drill holes for bolts.

Install plate and IACV.

Do not run coolant lines to IACV.

Connect IACV connector so you won't throw a CEL, or delete the IACV function if your EMS supports that.

IACV's are teh ghey.</TD></TR></TABLE>

Eliminating the IACV is not an option....

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by crx(gator) &raquo;</TD></TR><TR><TD CLASS="quote">

would this really work? i have cleaned my iacv like 3-4 times already and i get a CEL everyday. luckily i have a scanguage that can clear the code on the fly...</TD></TR></TABLE>

Yes, it will work.

 

Surely you can hold the gas down with j00r big feet in the winter.

 

bleed you coolant fluid

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Aquafina &raquo;</TD></TR><TR><TD CLASS="quote">Surely you can hold the gas down with j00r big feet in the winter.</TD></TR></TABLE>

lol, thats not even an issue.....the car isnt driven in the winter!

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by wildoutwhitegsr &raquo;</TD></TR><TR><TD CLASS="quote">bleed you coolant fluid</TD></TR></TABLE>

Been there, done that, got the t-shirt

 

http://www.team-integra.net/se...=1174
That's a good article about cleaning the IACV.

 

Are all B-series IACV the same?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by walker111 &raquo;</TD></TR><TR><TD CLASS="quote">Are all B-series IACV the same?</TD></TR></TABLE>

all obd2 b-series are the same

 

009 VALVE ASSY., ELECTRONIC AIR CO... INFO $226.67 Hype R
021 VALVE ASSY., ELECTRONIC AIR CO... INFO $191.67 LS auto

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JOHN WAYNE &raquo;</TD></TR><TR><TD CLASS="quote">

all obd2 b-series are the same</TD></TR></TABLE>

Right on, thanks