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IACV problem

 
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Old 02-22-2009, 12:10 AM
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IACV problem

i have no coolant lines going to my idle air control valve
can anyone tell me what hoses go on there?

i got an h22a
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Old 02-22-2009, 12:51 AM
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Re: IACV problem

coolant flow in and out of them. I am also trying to figure out how to run the lines. I think i have it figured out.
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Old 02-22-2009, 01:02 AM
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Re: IACV problem

what you do si96?

i might just block it off

ive seen people do that

and yes another connection problem i bought this car knowing there would be many problems the dude who did the swap is an idiot.
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Old 02-22-2009, 12:54 PM
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Re: IACV problem

Yeah you can just block it off/loop the lines, your choice. You don't even need it unless you live in a really cold climate. Even then, you can go without it.
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Old 02-22-2009, 01:14 PM
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Re: IACV problem

i will have a fluctuating idle though right?
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Old 02-22-2009, 01:17 PM
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Re: IACV problem

Not sure. Don't think you would, as long as your IACV is function properly. Don't quote me though.
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Old 02-22-2009, 01:22 PM
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Re: IACV problem

i have the worst fluctuating idle right now
i dont know what its due to
it comes when i drive for a few minutes and bring it up around 40
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Old 02-22-2009, 03:51 PM
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Re: IACV problem

Are you saying that when you bring it up to like 40 mph and push in the clutch the idle is fluctuating? Or are you saying when you are at 40 mph the revs are going up and down and it feels like the car is lurching? Because if it is lurching, it could possibly be a malfunctioning TPS. That what happened with mine btw.
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Im talking about the older ones. egs and ****. with a park bench and a exhaust that sticks out 30 ft.
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Old 02-22-2009, 04:00 PM
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Re: IACV problem

after driving for like 5- 10minutes the idle is going up and down if i dont give it gas

the car doesnt feel bad or anything drives fine
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Old 02-22-2009, 04:37 PM
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Re: IACV problem

Have you checked to see if you are throwing any codes?
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Im talking about the older ones. egs and ****. with a park bench and a exhaust that sticks out 30 ft.
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Old 02-22-2009, 06:03 PM
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Re: IACV problem

H22lude317 take of your intake, if you look at the thing the hose was connected to there should be two holes. Turn your car on, let it warm up (since you say it happens after it's been running) Then put your finger over one of the holes. If the idle stops fluctuating when you cover one of the holes it signifys that either your IACV or FICV is bad. (IACV = top hole FICV = bottom hole) Once you find out which one it is take it off and clean it (maybe even do both) if that doesn't stop the problem then you'll need to replace it. Most of the time it can be cleaned.
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Old 02-23-2009, 12:01 AM
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Quote:
Originally Posted by redvtec View Post
Have you checked to see if you are throwing any codes?
code 10
iats

Quote:
Originally Posted by BlazeYDH View Post
H22lude317 take of your intake, if you look at the thing the hose was connected to there should be two holes. Turn your car on, let it warm up (since you say it happens after it's been running) Then put your finger over one of the holes. If the idle stops fluctuating when you cover one of the holes it signifys that either your IACV or FICV is bad. (IACV = top hole FICV = bottom hole) Once you find out which one it is take it off and clean it (maybe even do both) if that doesn't stop the problem then you'll need to replace it. Most of the time it can be cleaned.
thanks ill do this tomorrow

Last edited by hotrod; 02-23-2009 at 11:24 AM. Reason: merging back to back posts.
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Old 02-23-2009, 06:56 AM
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Re: IACV problem

Go to autozone to have them see what the code is too. If you have a 4th gen your OBD meter is under your cup holder.
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Old 02-23-2009, 09:38 AM
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Re: IACV problem

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Originally Posted by BlazeYDH View Post
Go to autozone to have them see what the code is too. If you have a 4th gen your OBD meter is under your cup holder.
intake air temp sesnor

i jumped the 2p connector

they cant read obd1
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Old 02-23-2009, 07:28 PM
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Re: IACV problem

I would say you probably need to replace the sensor.

Here is the code info:
Code 10
Accord Civic CRV CRX Del Sol Odyssey Prelude
85-98 86-98 97-98 85-91 93-97 95-98 85-98 IAT Sensor (Intake Air Temperature)
defective circuit or unplugged / defective sensor

I would check to see if it is plugged in right if it is check to see if it is getting a voltage reading. If it is then ull most likely have to change the sensor.

Does anyone know the voltage it should be running??

If I'm wrong let me know.
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Im talking about the older ones. egs and ****. with a park bench and a exhaust that sticks out 30 ft.

Last edited by redvtec; 02-23-2009 at 07:31 PM.
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Old 02-23-2009, 07:28 PM
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Re: IACV problem

i have a similar problem i did a 5 spd swap and modded my auto ecu, after the swap i had a reving idle from 1500-1800 when i started the car as it warmed up it died down and stopped. now i got a check engine light it says it could be the IAC valve or coolant lines i tried the coolant lines and everything but it still reves like that and sometimes while driving the revs stay in the same spot but bounce a little. when that happens it hard to shift. any help on this too.....
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Old 02-23-2009, 10:20 PM
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Re: IACV problem

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Originally Posted by soto2635 View Post
i have a similar problem i did a 5 spd swap and modded my auto ecu, after the swap i had a reving idle from 1500-1800 when i started the car as it warmed up it died down and stopped. now i got a check engine light it says it could be the IAC valve or coolant lines i tried the coolant lines and everything but it still reves like that and sometimes while driving the revs stay in the same spot but bounce a little. when that happens it hard to shift. any help on this too.....
So you used the auto ecu?
If so, what did you do to mod it?
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Im talking about the older ones. egs and ****. with a park bench and a exhaust that sticks out 30 ft.
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Old 02-24-2009, 10:10 PM
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Re: IACV problem

Quote:
Originally Posted by redvtec View Post
So you used the auto ecu?
If so, what did you do to mod it?

i just moved that little piece that inside and soldered it, so that i guess it reads different. i followed all the steps from this thread on pp.com so i dont know if maybe its just the ecu causing this i checked for leaks, and my coolant. and i doubt that after my swap that my IAC valve would just mess up. so i have no idea.
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Old 02-26-2009, 04:51 PM
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Re: IACV problem

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Originally Posted by soto2635 View Post
now i got a check engine light it says it could be the IAC valve or coolant lines i tried the coolant lines and everything but it still reves like that and sometimes while driving the revs stay in the same spot but bounce a little. when that happens it hard to shift. any help on this too.....
So you checked for codes and it brought back a code saying possibly iacv or coolant lines? If so, do you remember what codes it was throwing?
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Old 02-26-2009, 05:31 PM
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Re: IACV problem

I don't know why it would be hard to shift, but just in case check your clutch fluid reservoir. Take off and clean your IACV and FITV. That should solve the fluctuating idle.
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Old 02-26-2009, 06:02 PM
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Re: IACV problem

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Originally Posted by BlazeYDH View Post
I don't know why it would be hard to shift, but just in case check your clutch fluid reservoir. Take off and clean your IACV and FITV. That should solve the fluctuating idle.
the clutch reservoir is fine its either the ecu or something else...
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Old 02-26-2009, 11:05 PM
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Re: IACV problem

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Originally Posted by BlazeYDH View Post
Take off and clean your IACV and FITV. That should solve the fluctuating idle.
I agree for the fluctuating idle that is all you should need to fix it. The hard to shift part though is a doozy. How old/how many miles is the trans. If you have a rough estimate that works too.
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Old 02-27-2009, 08:14 AM
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Re: IACV problem

Oh and before you ask what to clean the FITV and IACV you use carb cleaner. It's the best thing for it because it removes all the junk and it's soft.
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