Cleaning IAC Idle Air Control Valve FJ80 3FE | Idle fix 

Great video! One note is that the Phillips screws on Toyotas are actually JIS screws - they are very, very close to PH but the slight difference can aggravate the issue of stripping heads. JIS screwdrivers and screw bits are readily available on Amazon, eBay, and plenty of other spots at a variety of price points. Vessel is the best known brand and is really good; Anex, Hozan, and others make them as well. A #2 and a #3 JIS screwdriver should have you good for everything on your LC. The good news is that JIC drivers also fit into true PH screws very nicely so they can be used for both..

That is a stepper motor, you won't be able to push the plunger (the tapered metal seal) in like that. The plunger rides on a screw/auger and when the motor spins it moves the plunger into a hole or out of it to control. This controlled air bleed allows for the automated idle control. You can easily take the IACV apart where you see the seam in the the plastic base of the motor housing. Once done you'll see exactly how it works. If you manually adjust the plunger all the way out so (to where it's furthest from the motor and should be fully seated in the hole on the manifold when reinstalled) and then put it back together leaving the electrical connector off, the truck will run but idle low until the engine warms up. I had to due this on my 3FE FJ62 (3FE is 1988-1993) because I have another issue yet identified which keeps telling it to open up more than it should raising my idle 1500rpm. Also as others have said, use JIS bits. Penetrating oil, tighten a bit first and/or give the screw driver a light whack with a hammer to avoid stripping the head of the screw. Oh and the little metal sleeves are there to keep you from tightening too much and cracking or defining the plastic mounting tabs.

Going to give this a try! I also gained a lot of improvement from replacing my vacuum lines

Spot on. Thanks for putting this in. Just like you said, I stripped my bottom screw. Tried to take it off with an impact driver and the entire housing then broke. The cheapest I could find the new part was $217 on eBay. At the local auto parts store was over $500!

Thanx for the tip...my 92 fj80 has the same idling issue, so I will try this!

Just a couple of tips. I always pre soak nuts, bolts and screws with penetrating oil before I start to work on them. Another old trick is to try to break the "lock" or resistance of a bolt by turning it into the housing before trying to undo it. Also, good point about putting lots of pressure into the head of the bolt as you try to undo it so as to not "mangle" the bolt head. By the way "stripping" refers to damage done to the thread portion of bolts.

Super helpful Thank you, using it for my FJ62.

Thanks mate, fixed my rough idle probs, legend… Bowie

3fe only ran for two years and 80 series but it comes off the 60 series straight line 6 is a complete tank

Great video.

Thank you My Bro. I liked The video

Wanna do this just to clean it now. 👍👍

Thanks for sharing 👍🤝

Yes thank you nice one sometimes I do it too , now I learned something 😂

1:30 The IAC and TPS sensors are actually JIS #2, THE ARE NOT PHILLIPS HEAD... as are most screws on the truck. Getting the correct JIS tip will make your life easier, because it is easy to strip out the Phillips, even when using impact, because of the shape of the flutes. The JIS engage like cams and require less pressure (usually). Also, replace those screws with torx heads.

Hey bro, do you think this also be the reason why when I start my 80 I have a burst of thick exhaust /smoke in my initial start?

Change all old screws with torx problem solved.

Muy bien,entendido. Ahora limpiare la iac de mi Land cruiser 4500. Por qué está muy acelerada en relanti o mínimo. Gracias

Bro that's good video. However, I couldn't find the Idle Air Control (IAC) Valve on my FZJ80R Factory turbo Diesel engine 1994 model. Does it exist only in petrol engines or am I not looking correctly. Thanks

Thanks for this video my guy! I will give this a shot as my truck also seems to stumble at red lights. Kind of a big ask but do you have any insight on trouble shooting a non-working rpm guage? I don't have a FSM yet so it's been difficult to get info on the system.

I have a problem similar with my 91. Mine seems to idle low and occasionally will actually turn off from idling so low

My problem is backwards! It wont idle fast enough with the AC on. I already adjusted the idle flat head screws and no luck. I would replace those screws with allen ones and some anti seize. 650RPM are for AC off. Forgot to mention that mine has a solenoid to compensate the idle with the AC on.

Hi, good video. This is exactly my issue, high rough idle. Have you ever set your timing using the small hole to view the flywheel.

Mate, my home done port n polished idles at 620, sounds like throttle body needs a pull down nd lube pivots

Did you know about rpm sensor for vx80? Because I’ve problem about that, the rpm sensor is always up and down when idle. How to fix that? Thanks

Was there a difference in how much the end of the sensor could move between before it was cleaned and after?

Speaking of air... does the FJ80 have the so called "Tuna Can" pre filter under the Air Filter housing? I've been reading recently a lot about it, tried to open mine, took off the two claps but looks as if it is stuck or perhaps the previous owner put silicone in it. Just wandering if the FJ80 has it too

I just picked up 1991 LC like yours 3 days but the RPM Needle is not working. Could you help me how to fix this issue? Thank you in advance.

I have a 3f carbureted engine would this have a IAC valve? And if it does where would it be located?

I would like to caution folks against this process. The Toyota service manual specifies removal/replacement of this part by removing the cooling assembly it is mounted on (two bolts) In my case, the screws did not strip, but the valve itself came apart as the plastic housing has essentially melded with the cooling. This causes small internal parts of the valve to fall out and I had to guess how to reassemble. If the plunger needs to be cleaned, I recommend removing as per the factory service manual, and using a pipe cleaner or some other tool to reach it instead of removing parts as seen in this video. Good luck!

Use a JIS screw driver And when reassy use Allen heads

High idle? It was cold. Then you showed lower idle at full temp.? Lol

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