Just recleaned mine. I used seafoam this time and approached the cleaning a little different. I disconnected the hose to the IACV from the motor. I then slowly filled the port to the IACV inside the TB until the hose started to overfill . I held the hose upright. Then I let gravity and suction do the rest. When I raised the hose the level of the seafoam whould raise. I then would plug the hose with my thumb and let it sit for a minute or so. Then lowered the hose with level making its way thru the IACV. Plugged hole for same time frame. I did this for a total of 10 times on both high and low side. The way I figure, with the chemical raising and lowering itself would act as a scrubbing method.
Check engine light is off. Idle is much better. Vibration is still noticable at a stop but nowhere near as bad as before.
Was it a waste of time? Who knows. Positive results in the end .
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ok, i know this is an older original posting, but i had to create an account & login to thank tcheung & lexmex in case they still receive replies: you guys have saved the day twice for me (& of course a wad of cash) w/ your postings, so i wanted to thank you for this IACV how-to w/ pics... it was my bible on my ipod touch propped up under the hood, extremely helpful, & i solved the issue
i also appreciate the tips & warnings on things like the over-torqued screws - this probably prevented me from creating a bigger problem, so big thx for that too
this is a great forum & i hope i can contribute (vs follow direx) one day re: how to solve issues on my 2000 RX300
i also got a huge kick out of lexmex's "speed-demon RX300", considering the native contradiction in terms of this phrase!
I wanted to thank everyone for the wealth of knowledge in this thread. This turned into a long job due to one the screws, but I got them off with PB Blaster and vice grips. I replaced them with regular bolts with a little bit of anti seize, since I'll probably have to do this again in the future.
My RX300 has been idling rough since last week and I figured it was bad gas. After reading this thread I figured I'd take a look at the IACV since I've had a few problems on my other cars with this part. The "****" would barely turn, but now it seems to have no resistance. I used carb cleaner, and let it drain out the bottom.
Now my car idles like it should. The K&N filter probably didn't help matters any and from now on I'll be more careful when it comes to oiling it. Looks like I had a mouse living in my airbox at some point in time.
Your description of the problem was right on the money. The IACV was not turning freely. I sprayed it after following your directions on how to get to the IACV. After a couple of sprays with Air-Intake cleaner it turned freely. Sprayed and wiped clean a few more times. Reassembled and after a few tries the engine turned over. I had my wife check the exhaust tailpipe and the carbon was coming out and then cleared up. I am sure this was the problem and thanks to your instructions I sure the problem is solved and saved quite a few bucks also.
Appreciate the help and again I thank you.
I just wanted to thank each that told me what to do. I'm 70 years old and still trying to maintain my cars. I am learning how to use this forum so if I make a mistake bear with me. The information fixed my wife's rx300 it purrs like a kitten now. Keep up the good info. Fred
This is the best site on the internet. I cleaned mine and didn't realize how dirty the IACV could get. Idles like or better than a new car. Thanks to Lexmex for ALL his information. Now I got to check all the hoses to the canister and see if I can stop the engine light from coming on. Ethanol gas stinks. I have found a station that sells ethanol free fuel and I have switched to it, costs more but the car runs better on it. Thanks again to all you Lexus guys. Fred