IAC Valve?

Ramon_12345 · 07-11-2005, 11:03 AM

Yesterday morning I started the car to go to church and no sooner than I started and moved off, the engine revs started to “beat down” like if the car wanted to cut-out and I even smelt petrol. However as I continued to drive the car the problem vanished.

This morning I started it and the same thing happened however I noticed that it only occurred initially when I eased the car forward and stopped. However as I continued to drive the car, the problem seemed to have vanished as I could drive in stop-and-go traffic without any incident.

My question is, what could be the problem? I suspect a sticking IAC valve however any other suggestions would be greatly appreciated.

Thanks.

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Legacy777 · 07-11-2005, 01:09 PM

what year & model car do you have? AT or MT?

Ramon_12345 · 07-11-2005, 01:13 PM

1999 Impreza. Automatic Transmission

Al_Smokemcrack · 07-11-2005, 01:33 PM

There are so many things that can cause that. An IAC is a good place to start, though. Search around and you should be able to find a procedure for cleaning it. I know I saw it in here, I just don't remember where, exactly.

El_Kameleon_G · 07-11-2005, 03:35 PM

how long do you warm up the car for?

Ramon_12345 · 07-12-2005, 01:47 AM

I usually just get in and drive at about 50 km/h until the engine gets to its normal operating temperature and then I usually drive faster if I have to but I don't until the car is warmed up.

07-11-2005, 11:03 AM	#1
Ramon_12345 Scooby Newbie Member#: 72021 Join Date: Oct 2004 Location: BARBADOS Vehicle: 1999 JDM GC1 IMPREZA WHITE	IAC Valve? Yesterday morning I started the car to go to church and no sooner than I started and moved off, the engine revs started to “beat down” like if the car wanted to cut-out and I even smelt petrol. However as I continued to drive the car the problem vanished. This morning I started it and the same thing happened however I noticed that it only occurred initially when I eased the car forward and stopped. However as I continued to drive the car, the problem seemed to have vanished as I could drive in stop-and-go traffic without any incident. My question is, what could be the problem? I suspect a sticking IAC valve however any other suggestions would be greatly appreciated. Thanks. * Registered users of the site do not see these ads.

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07-11-2005, 01:09 PM	#2
Legacy777 Scooby Guru Member#: 4800 Join Date: Mar 2001 Chapter/Region: TXIC Location: Houston, Tx Vehicle: 1990 Legacy & 97 OBS AWD 5MT EJ22T AWIC Swap	what year & model car do you have? AT or MT?

07-11-2005, 01:13 PM	#3
Ramon_12345 Scooby Newbie Member#: 72021 Join Date: Oct 2004 Location: BARBADOS Vehicle: 1999 JDM GC1 IMPREZA WHITE	1999 Impreza. Automatic Transmission

07-11-2005, 01:33 PM	#4
Al_Smokemcrack Scooby Specialist Member#: 66640 Join Date: Jul 2004 Chapter/Region: Tri-State Location: Rochester, NY Vehicle: 1997 Legacy Outback Glacier White	There are so many things that can cause that. An IAC is a good place to start, though. Search around and you should be able to find a procedure for cleaning it. I know I saw it in here, I just don't remember where, exactly.

07-11-2005, 03:35 PM	#5
El_Kameleon_G Scooby Specialist Member#: 87103 Join Date: May 2005 Chapter/Region: TXIC Location: San Antonio, TX Vehicle: 2005 Impreza RS RWD Plat'num Plus...SOLD!	how long do you warm up the car for?

07-12-2005, 01:47 AM	#6
Ramon_12345 Scooby Newbie Member#: 72021 Join Date: Oct 2004 Location: BARBADOS Vehicle: 1999 JDM GC1 IMPREZA WHITE	I usually just get in and drive at about 50 km/h until the engine gets to its normal operating temperature and then I usually drive faster if I have to but I don't until the car is warmed up.