ICV, Idle Control Valve. Help

Old 07-05-2005, 06:52 AM
rnl is offline
Thread Starter
Join Date: Jul 2005
Posts: 8
Default ICV, Idle Control Valve. Help

I have this problem seem to be the ICV. When start, idle at around 1,500 RPM. Shift in gear (either D or R), drop down slightly at around 1k or 1,100 (still little high). After about 15, 20 driving, it drop down to around 800 or 900 as normal. I guess it is the ICV.

I bought this car used. I recently check the previous record (recepts) and found the dealer has cleaned the LCV once which means it has this problem before and deal suspect it was the ICV.

I plan top take it out to clean it before I have to spend $$ on the new one, if cleaning won't work. Doesn anyone know where it is in the car? Any picture or instruction on the internet somewhere?

Thanks much in advance.

2000 ES300
Old 07-05-2005, 03:43 PM
Join Date: Mar 2005
Posts: 140
Default RE: ICV, Idle Control Valve. Help

has the car been tuned up recently?
Old 04-04-2007, 01:49 AM
Join Date: Mar 2007
Posts: 24
Default RE: ICV, Idle Control Valve. Help

Have you check youre ICV position in correct place? if it still persist... try cleaning it? plus recently been tune up ? if it comes to worst replace the ICV located on the throttel body
Old 10-01-2007, 01:07 AM
rnl is offline
Thread Starter
Join Date: Jul 2005
Posts: 8
Default RE: ICV, Idle Control Valve. Help

Twice I try to get it off the car but I couldn't. I opened up a portion of it (still on the car) and sprayed WD40 with no help. The whole ICV was hold on to other part with several philips screws, not bolts, and they are so tight and space is so limited. I already slipped one of them.
Anyone know any trict to get this off?
Old 10-14-2007, 09:25 PM
Join Date: Oct 2007
Posts: 6
Default RE: ICV, Idle Control Valve. Help

Okay, here is what you want to do.

1.) take off air cleaner top portion of box.

2.) take off the intake pieces upto where the IAC is located (Idle Air Control valve)

3.) take off the electro-magnet (because it is what turns the IAC as commanded by the computer)

4.) the round thing that you see it the metal the the electro-magnet turns. It is a stepper-motor type system. You will see a port just inside the intake above the IAC valve, spray intake cleaner or equivelent into that hole while turning the valve back and forth. You will feel when it is free, big difference!!!

5.) while you are at it, clean the intake past that point with an old tooth-brush and the cleaner. That service with the IAC and cleaning of the intake is a 1 hour charge.

6.) make sure you don't over-use the cleaner, you don't want to hydro-lock the engine, so also make sure you let it air out for 10 minutes after wards.

7.) when starting after connecting everything, you WILL have to hold it WOT so that it will start and clear out all the crap you put into it.
Related Topics
Thread Starter
Last Post
General Tech Help
11-14-2010 11:42 AM
Lexus GS
01-31-2009 01:59 PM
Suspension sponsored by Arnott Inc.
12-30-2008 05:39 PM
Lexus SC
05-08-2006 09:30 AM
Lexus SC
05-08-2006 09:28 AM

Thread Tools
Search this Thread
Quick Reply: ICV, Idle Control Valve. Help

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.