RPM's nearly doubled after IACV cleaning! HELP!
04-23-10, 09:42 PM
#16
Driver
DarwinX,
I had similar troubles after cleaning my IACV. After I cleaned it out a few times, my RPM's at idle and when sitting in traffic at a stoplight, were high.
I ended up just buying a new IACV and had my independent mechanic put it in. I have not had any more problems with a high idle and the RX runs just like new again.
If you need the part numbers, shoot me a PM. Good luck with the fix!
I had similar troubles after cleaning my IACV. After I cleaned it out a few times, my RPM's at idle and when sitting in traffic at a stoplight, were high.
I ended up just buying a new IACV and had my independent mechanic put it in. I have not had any more problems with a high idle and the RX runs just like new again.
If you need the part numbers, shoot me a PM. Good luck with the fix!
04-24-10, 06:32 AM
#17
Super Moderator
Well, about 6 months ago, I killed the MAF as well. That's just how I roll. lol I re cleaned the IACV today using electric circuit cleaner, and sure enough the problem seem to have been settled, but now I get yet another pd CEL code - P0133 along with the original P0125 + P1135 +P1130. Also, the RPM's are at exactly 1,000 in Park and just below that in Drive, still seems a little high as it used to be around 700 at idle. The actual magnet controller was twisting with difficulty initially but then loosened up. Originally, it rolled both ways quite smoothly so I blame everything on the degreaser I used. Another note, I am hearing a slight hissing noise which sounds like Air, so could it be the pump? I left nothing disconnected! I did reset the ECU, perhaps there is a learning curve.
Thank You for all of your valuable input, please provide further advice if available.
Thank You for all of your valuable input, please provide further advice if available.
I'd wait a bit and drive the vehicle to see if things improve, there is a bit of a learning curve.
04-27-10, 03:15 AM
#18
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I took out both the rubber seal and the metal ring in order to clean the IACV as it was no longer turning smoothly after the crappy engine cleaner I used in the previous cleaning. The electronic circuitry cleaner was recommended by NAPA and did a far better job at cleaning than anything else, it also leaves NO residue of any kind and dries nearly instantly! Perfect for such jobs... Thanks for all the advice.
05-03-10, 08:28 AM
#19
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sigh.
i've been having this problem since last november. i posted about it elsewhere here. an indie mechanic diagnosed it as the IACV valve, and i ordered the parts from lexusparts.com, but when the parts arrived he no longer wanted to do it (no longer had the time because he had joined a new shop)
, which forced me to go to the dealer, who made their own diagnosis and said it was some sort of vaccum issue. i ended up having to return the part and go with my dealer's claims... well, $980 later in dealer costs plus whatever i lost sending the IACV back to stevenson and now i'm back to idling at 1100rpm and the car keeps thinking it's accelerating so it never goes into 4th anymore. i won't even mention that vicious jerking whenever i try to shift into reverse or drive from high rpms... fail 
i've been having this problem since last november. i posted about it elsewhere here. an indie mechanic diagnosed it as the IACV valve, and i ordered the parts from lexusparts.com, but when the parts arrived he no longer wanted to do it (no longer had the time because he had joined a new shop)
, which forced me to go to the dealer, who made their own diagnosis and said it was some sort of vaccum issue. i ended up having to return the part and go with my dealer's claims... well, $980 later in dealer costs plus whatever i lost sending the IACV back to stevenson and now i'm back to idling at 1100rpm and the car keeps thinking it's accelerating so it never goes into 4th anymore. i won't even mention that vicious jerking whenever i try to shift into reverse or drive from high rpms... fail
Last edited by Benjamin T; 05-03-10 at 08:31 AM.
05-03-10, 12:59 PM
#20
sigh.
i've been having this problem since last november. i posted about it elsewhere here. an indie mechanic diagnosed it as the IACV valve, and i ordered the parts from lexusparts.com, but when the parts arrived he no longer wanted to do it (no longer had the time because he had joined a new shop), which forced me to go to the dealer, who made their own diagnosis and said it was some sort of vaccum issue. i ended up having to return the part and go with my dealer's claims... well, $980 later in dealer costs plus whatever i lost sending the IACV back to stevenson and now i'm back to idling at 1100rpm and the car keeps thinking it's accelerating so it never goes into 4th anymore. i won't even mention that vicious jerking whenever i try to shift into reverse or drive from high rpms... fail
i've been having this problem since last november. i posted about it elsewhere here. an indie mechanic diagnosed it as the IACV valve, and i ordered the parts from lexusparts.com, but when the parts arrived he no longer wanted to do it (no longer had the time because he had joined a new shop)
, which forced me to go to the dealer, who made their own diagnosis and said it was some sort of vaccum issue. i ended up having to return the part and go with my dealer's claims... well, $980 later in dealer costs plus whatever i lost sending the IACV back to stevenson and now i'm back to idling at 1100rpm and the car keeps thinking it's accelerating so it never goes into 4th anymore. i won't even mention that vicious jerking whenever i try to shift into reverse or drive from high rpms... fail
05-04-10, 12:07 AM
#21
Lexus Champion
sigh.
i've been having this problem since last november. i posted about it elsewhere here. an indie mechanic diagnosed it as the IACV valve, and i ordered the parts from lexusparts.com, but when the parts arrived he no longer wanted to do it (no longer had the time because he had joined a new shop), which forced me to go to the dealer, who made their own diagnosis and said it was some sort of vaccum issue. i ended up having to return the part and go with my dealer's claims... well, $980 later in dealer costs plus whatever i lost sending the IACV back to stevenson and now i'm back to idling at 1100rpm and the car keeps thinking it's accelerating so it never goes into 4th anymore. i won't even mention that vicious jerking whenever i try to shift into reverse or drive from high rpms... fail
i've been having this problem since last november. i posted about it elsewhere here. an indie mechanic diagnosed it as the IACV valve, and i ordered the parts from lexusparts.com, but when the parts arrived he no longer wanted to do it (no longer had the time because he had joined a new shop)
, which forced me to go to the dealer, who made their own diagnosis and said it was some sort of vaccum issue. i ended up having to return the part and go with my dealer's claims... well, $980 later in dealer costs plus whatever i lost sending the IACV back to stevenson and now i'm back to idling at 1100rpm and the car keeps thinking it's accelerating so it never goes into 4th anymore. i won't even mention that vicious jerking whenever i try to shift into reverse or drive from high rpms... fail 
05-04-10, 09:52 AM
#22
Moderator
sigh.
i've been having this problem since last november. i posted about it elsewhere here. an indie mechanic diagnosed it as the IACV valve, and i ordered the parts from lexusparts.com, but when the parts arrived he no longer wanted to do it (no longer had the time because he had joined a new shop), which forced me to go to the dealer, who made their own diagnosis and said it was some sort of vaccum issue. i ended up having to return the part and go with my dealer's claims... well, $980 later in dealer costs plus whatever i lost sending the IACV back to stevenson and now i'm back to idling at 1100rpm and the car keeps thinking it's accelerating so it never goes into 4th anymore. i won't even mention that vicious jerking whenever i try to shift into reverse or drive from high rpms... fail
i've been having this problem since last november. i posted about it elsewhere here. an indie mechanic diagnosed it as the IACV valve, and i ordered the parts from lexusparts.com, but when the parts arrived he no longer wanted to do it (no longer had the time because he had joined a new shop)
, which forced me to go to the dealer, who made their own diagnosis and said it was some sort of vaccum issue. i ended up having to return the part and go with my dealer's claims... well, $980 later in dealer costs plus whatever i lost sending the IACV back to stevenson and now i'm back to idling at 1100rpm and the car keeps thinking it's accelerating so it never goes into 4th anymore. i won't even mention that vicious jerking whenever i try to shift into reverse or drive from high rpms... fail At this time you should go back to the dealer and say they failed to fix the issue. It would have been lot better if you had said it at the time when you drove off the repair facility.
Unfortunately, they may go through another set of sensors and you may get into the discussion about the previous fix (or repair which ended up in nothing fixed). What was/is really needed and what gets replaced is always gray area. The dealership may take some money off, but expect to pay more.
Salim
05-04-10, 02:32 PM
#24
Moderator
Is this a statement based on certain experience at the dealership or a unsatisfied customer?
I have had mostly good/better experience at Lexus. This seems to be echoed by most of the posts that I have seen in CL Forum.
Salim
I have had mostly good/better experience at Lexus. This seems to be echoed by most of the posts that I have seen in CL Forum.
Salim
05-05-10, 03:08 AM
#25
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I was referring to the dealers of the Lexus brand, not Toyota as a company. Here in Jacksonville, there is only one Lexus dealership and it does indeed lack competence.
Is it difficult to replace the IACV? My problem was resolved with proper cleaning of said valve, yet I'd still like to know for personal reference. Thanks.
Is it difficult to replace the IACV? My problem was resolved with proper cleaning of said valve, yet I'd still like to know for personal reference. Thanks.
05-05-10, 09:34 AM
#27
Moderator
I was referring to the dealers of the Lexus brand, not Toyota as a company. Here in Jacksonville, there is only one Lexus dealership and it does indeed lack competence.
Is it difficult to replace the IACV? My problem was resolved with proper cleaning of said valve, yet I'd still like to know for personal reference. Thanks.
Is it difficult to replace the IACV? My problem was resolved with proper cleaning of said valve, yet I'd still like to know for personal reference. Thanks.
With only one dealership around you are locked in. I would still suggest work with your service writer and try to get the best mechanic on the job. I dont expect master tech to work on your vehicle, but can be used to consult.
Salim
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