How to fix IAC?

Jastel · 04-11-2009, 09:52 PM

Gday guys, My BA has been idling really badly for a few weeks now and I thought it was bad fuel. Well Ive run 4 tanks through it and changed the filter as well but it still does it. It nearly stalls when I switch the aircon on as well.
I searched the forums and saw that it might be my IAC? Does it sit directly underneath the throttle body?

Exactly what do I have to do to fix this.... or is it a replacement situation?

Cheers
Jason

Joeee · 05-11-2009, 09:11 AM

Hey Jason,

Try checking the small hoses on the sensor connected to the airbox, if one of these is off the idle speed may vary, happened to me though not quite to the extent you described..

Joe

asanga · 05-11-2009, 10:56 AM

Yes...IAC is directly underneath the TB. It has a electrical connector with two wires. Check the resistance between the two terminals (on the IAC , not the harness) it should be about 9 - 11 ohms. If the IAC valve its dirty you can clean it with carby cleaner. Also look for any cracks in the air intake pipe and two small hoses.

asanga · 05-11-2009, 11:15 AM

This may help!

phly · 05-11-2009, 02:02 PM

a little off topic, but what manual/book is that and where can i get my hands on one?

asanga · 05-11-2009, 03:12 PM

Quote:

Originally Posted by phly

a little off topic, but what manual/book is that and where can i get my hands on one?

its the mazda workshop manual ....$99 from bookworks

Jastel · 06-11-2009, 08:26 AM

Cheers fellas, I'll have a look at it on the weekend.

Jastel · 18-11-2009, 06:14 PM

Ok so my IAC is stuffed.... can anyone suggest where I can get one and how much they cost?

asanga · 18-11-2009, 09:03 PM

Quote:

Originally Posted by Jastel

Ok so my IAC is stuffed.... can anyone suggest where I can get one and how much they cost?

wreckers = $100-120
Mazda = $600-700

your choise !

Clean_Cookie · 24-11-2009, 07:34 PM

quick hint. recently i developed a rough idle, stalling when putting into neutral etc. bascially annoying to drive... fixed with a $9 bottle of carby cleaner. fellowed the advice of one on my work mates whos really good with cars and he said these engines build up heaps of muck so spray a ****load into the air intake (with the engine off and throttle open) and then start it will result in a black cloud of smoke and i did this twice then got adventourous and tried with the engine running, opened enough to get a small tube (came with teh can) and sprayed into the engine while opening throttle (dies otherwise) and bingo FIXED! had to wash the car afterwards but worth it

anyone struggling follow this and youll be laughing hopefully!

Jastel · 23-03-2010, 04:10 PM

Quote:

Originally Posted by tc3_racer_001

quick hint. recently i developed a rough idle, stalling when putting into neutral etc. bascially annoying to drive... fixed with a $9 bottle of carby cleaner. fellowed the advice of one on my work mates whos really good with cars and he said these engines build up heaps of muck so spray a ****load into the air intake (with the engine off and throttle open) and then start it will result in a black cloud of smoke and i did this twice then got adventourous and tried with the engine running, opened enough to get a small tube (came with teh can) and sprayed into the engine while opening throttle (dies otherwise) and bingo FIXED! had to wash the car afterwards but worth it

anyone struggling follow this and youll be laughing hopefully!

Is yours still running ok?

I've persisted with mine until now, it's really giving me the ****s and my fuel economy has gone downhill.
I've been to the wreckers and they want $145 but I can get a new one from the US for `$148
This is not a new one but it's what is on mine
http://cgi.ebay.com/ebaymotors/99-00...Q5fAccessories

Apparently the one I have on mine is from a BJ.... I have confirmed that mine is the same as the one in that link so I really don't know whats going on.
I'll give the carby cleaner a try though before I purchase.

Clean_Cookie · 23-03-2010, 04:23 PM

nope, my IAC is gone too. i think we can get them from REPCO etc for around $90. dont quote me on that, i think project r (ryan also) said this. ill be getting one soon as im sick of it going crazy. i took mine to get a tune and was alot better but yeah still needed replacing, slowing either going out of tune or commpletely failed becuase its gotten worse... if you get one lmk where abouts and how much $$

EDIT: looking at my invoice for the tuneup its listed "NOTE: Wax Pallet Valve in throttle body is faulty and is causing the high idle" umm nothing on google reveals anything but porn and malware! i assume its the same sensor, as there is only 2 on the TB.

also i just called REPCO and he looked on the system and in a few books for both mazda and FORD and has no IAC's listed for any model in the 1994-98/1.8ltr range?

im a bit lost now...

Jastel · 23-03-2010, 04:40 PM

Not a problem, I'll be doing some ringing around tomorrow.
Is yours the same as the one in the link I posted? The local wreckers told me my BA shouldnt have that IAC as it's from a BJ.

project.r.racing · 23-03-2010, 07:02 PM

i've sold 2 the in past year. wreckers will have heaps.

for a BA the are 2 different types.

Jastel · 29-03-2010, 03:15 PM

Well I did my calling around today and it seems they are no longer available aftermarket. Looks like it's Ebay USA for me.

Clean_Cookie · 29-03-2010, 09:45 PM

yep...

asanga · 29-03-2010, 10:38 PM

Quote:

Originally Posted by Jastel

Well I did my calling around today and it seems they are no longer available aftermarket. Looks like it's Ebay USA for me.

whats the link for a new one from US ?

Jastel · 07-04-2010, 04:21 PM

Quote:

Originally Posted by asanga

whats the link for a new one from US ?

Gday, Sorry I completely overlooked your post....

This is the one I purchased from the states

http://cgi.ebay.com/ebaymotors/ws/eB...K%3AMEWNX%3AIT

I purchased it last monday and it arrived yesterday, I put it in and it fixed the problem I was having.... runs like a dream now.

Clean_Cookie · 07-04-2010, 04:26 PM

glad to hear its all good! im still struggling, mine is now driving rough as and cant fix it, it refuses to run (dunno why but it is- maybe something else is dead haha) at 2200rpm. it shakes and complains. runs awesome at 3500-7000 but... bit strange. i did readjust the timing but its confused me as to why i now have a funny spot in the rev range.

id like to get one from australia as that one looks different to the one i need to try and get for my car...

dreadnought1275 · 19-05-2010, 02:31 AM

Quote:

Originally Posted by Jastel

Gday, Sorry I completely overlooked your post....

This is the one I purchased from the states

http://cgi.ebay.com/ebaymotors/ws/eB...K%3AMEWNX%3AIT

I purchased it last monday and it arrived yesterday, I put it in and it fixed the problem I was having.... runs like a dream now.

Hi,

Is that for BA 323's? I have a '98 BA hatch...

TIA

04-11-2009, 09:52 PM	#1
Jastel Junior Member Join Date: Apr 2009 Location: Newcastle NSW Car: 97 BA 323 Astina Hatch Posts: 211	How to fix IAC? Gday guys, My BA has been idling really badly for a few weeks now and I thought it was bad fuel. Well Ive run 4 tanks through it and changed the filter as well but it still does it. It nearly stalls when I switch the aircon on as well. I searched the forums and saw that it might be my IAC? Does it sit directly underneath the throttle body? Exactly what do I have to do to fix this.... or is it a replacement situation? Cheers Jason

05-11-2009, 10:56 AM	#3
asanga Senior Member Join Date: Dec 2006 Location: Sutherland Sydney Car: astina BA 1997 1.8Ltr Posts: 609 View Photos By: asanga	Yes...IAC is directly underneath the TB. It has a electrical connector with two wires. Check the resistance between the two terminals (on the IAC , not the harness) it should be about 9 - 11 ohms. If the IAC valve its dirty you can clean it with carby cleaner. Also look for any cracks in the air intake pipe and two small hoses. __________________ 1997 Astina BA11P3, 5 Door Hatch, 1.8 DOHC, 5 Speed, 90,000 kms

05-11-2009, 11:15 AM	#4
asanga Senior Member Join Date: Dec 2006 Location: Sutherland Sydney Car: astina BA 1997 1.8Ltr Posts: 609 View Photos By: asanga	This may help! __________________ 1997 Astina BA11P3, 5 Door Hatch, 1.8 DOHC, 5 Speed, 90,000 kms

05-11-2009, 02:02 PM	#5
phly AstinaGT Regular Join Date: Apr 2007 Location: Sydney Car: 97 BA Astina Hatchback Posts: 384 View Photos By: phly	a little off topic, but what manual/book is that and where can i get my hands on one? __________________ 1997 Mazda Astina 323 BA Hatchback

24-11-2009, 07:34 PM	#10
Clean_Cookie obsessed-incomplete-broke Join Date: Oct 2008 Location: Brisbane Car: BA Hardtop/Hatch Posts: 5,441	quick hint. recently i developed a rough idle, stalling when putting into neutral etc. bascially annoying to drive... fixed with a $9 bottle of carby cleaner. fellowed the advice of one on my work mates whos really good with cars and he said these engines build up heaps of muck so spray a ****load into the air intake (with the engine off and throttle open) and then start it will result in a black cloud of smoke and i did this twice then got adventourous and tried with the engine running, opened enough to get a small tube (came with teh can) and sprayed into the engine while opening throttle (dies otherwise) and bingo FIXED! had to wash the car afterwards but worth it anyone struggling follow this and youll be laughing hopefully! __________________ Worklog

05-11-2009, 09:11 AM	#2
Joeee Junior Member Join Date: Nov 2009 Location: Ulverstone, TAS Car: 1995 BA Astina Posts: 70	Hey Jason, Try checking the small hoses on the sensor connected to the airbox, if one of these is off the idle speed may vary, happened to me though not quite to the extent you described.. Joe

06-11-2009, 08:26 AM	#7
Jastel Junior Member Join Date: Apr 2009 Location: Newcastle NSW Car: 97 BA 323 Astina Hatch Posts: 211	Cheers fellas, I'll have a look at it on the weekend.

18-11-2009, 06:14 PM	#8
Jastel Junior Member Join Date: Apr 2009 Location: Newcastle NSW Car: 97 BA 323 Astina Hatch Posts: 211	Ok so my IAC is stuffed.... can anyone suggest where I can get one and how much they cost?

23-03-2010, 04:23 PM	#12
Clean_Cookie obsessed-incomplete-broke Join Date: Oct 2008 Location: Brisbane Car: BA Hardtop/Hatch Posts: 5,441	nope, my IAC is gone too. i think we can get them from REPCO etc for around $90. dont quote me on that, i think project r (ryan also) said this. ill be getting one soon as im sick of it going crazy. i took mine to get a tune and was alot better but yeah still needed replacing, slowing either going out of tune or commpletely failed becuase its gotten worse... if you get one lmk where abouts and how much $$ EDIT: looking at my invoice for the tuneup its listed "NOTE: Wax Pallet Valve in throttle body is faulty and is causing the high idle" umm nothing on google reveals anything but porn and malware! i assume its the same sensor, as there is only 2 on the TB. also i just called REPCO and he looked on the system and in a few books for both mazda and FORD and has no IAC's listed for any model in the 1994-98/1.8ltr range? im a bit lost now... __________________ Worklog Last edited by Clean_Cookie; 23-03-2010 at 04:40 PM.

23-03-2010, 04:40 PM	#13
Jastel Junior Member Join Date: Apr 2009 Location: Newcastle NSW Car: 97 BA 323 Astina Hatch Posts: 211	Not a problem, I'll be doing some ringing around tomorrow. Is yours the same as the one in the link I posted? The local wreckers told me my BA shouldnt have that IAC as it's from a BJ.

23-03-2010, 07:02 PM	#14
project.r.racing Senior Member Join Date: Sep 2004 Location: n/a Car: n/a Posts: 10,929	i've sold 2 the in past year. wreckers will have heaps. for a BA the are 2 different types.

29-03-2010, 03:15 PM	#15
Jastel Junior Member Join Date: Apr 2009 Location: Newcastle NSW Car: 97 BA 323 Astina Hatch Posts: 211	Well I did my calling around today and it seems they are no longer available aftermarket. Looks like it's Ebay USA for me.

29-03-2010, 09:45 PM	#16
Clean_Cookie obsessed-incomplete-broke Join Date: Oct 2008 Location: Brisbane Car: BA Hardtop/Hatch Posts: 5,441	yep... __________________ Worklog

07-04-2010, 04:26 PM	#19
Clean_Cookie obsessed-incomplete-broke Join Date: Oct 2008 Location: Brisbane Car: BA Hardtop/Hatch Posts: 5,441	glad to hear its all good! im still struggling, mine is now driving rough as and cant fix it, it refuses to run (dunno why but it is- maybe something else is dead haha) at 2200rpm. it shakes and complains. runs awesome at 3500-7000 but... bit strange. i did readjust the timing but its confused me as to why i now have a funny spot in the rev range. id like to get one from australia as that one looks different to the one i need to try and get for my car... __________________ Worklog