Removing & Cleaning IACV & Throttle Body

Hope this can help about most of the topics related to IACV (Idle Air Control Valve) Also youll get the idea of cleaning the throttle body properly aswell.

This can help some of you if your car idles funny etc.

This was the method i used without problems, If you are not comfortable carrying out this work yourself please turn away and consult a proffesional.

I will not be held liable if you rape something in the process.

Firstly…..If you dont know how to remove your stock air box or take your induction kit, Have a look in the DIY section as there are loads of DIY threads about fitting cold air induction and short rams they should give you the general idea of removing the stock air box and your intake.

What You Will Need

  • A Socket Spanner Set (I cannot remember all the sizes of the bolts but im sure nearly all diyers have a ratchet set)
  • 2 X 12MM Spanners
  • Carb Cleaner/TB Cleaner
  • Cotton Ear Buds Are Useful
  • Standard or Needle Nose Plier
  • Standard Screw Driver
  • WD40 (May Be Needed)
  • Drill (May Be Needed)
  • Screw Extractor (May Be Needed)
  • Patience (Will be needed if the screws are seized and are a horse )
  • Lint Free Clotch/Microfibre Cloth
  • New Bolts Or Screws (May Be Needed)
  • Torx Keys (I didnt need these as i had to drill my IACV sensor thing off) You dont have to remove this tho, I did however.
  • Idle Air Control Valve Gasket

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Undo the negative battery so your ecu is reset when you come to fit everything back on.

Firstly locate the throttle body

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2. Removal of throttle cable

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Grab Your 12mm Spanners and undo the nuts as shown below
Try to crack open just one nut so when you come to reinstall your idle is still set correctly just undo the nut enough to slide the cable out of the bracket.

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Once away you need to pull down on the cable to undo it from the throttle body thing.

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Now thats off leave it to one side and start to undo the throttle body with your ratchet set.

Lower bolt
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Upper Nutb3fb99a174b47e0c8ffe6e425c083025  Removing & Cleaning IACV & Throttle Body

Also grab a plier and undo the clip on the hose going into the throttle body, pull that away so you have more room to work with.

There are 2 nuts and 2 bolts holding the throttle body to the intake manifold, undo the top two nuts, Removal of plastic engine cover may be neccesary to gain access to the other two.

Once all undone pull the throttle body towards you and it should slide off the two studs.

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You will now have to undo the IACV which is on the bottom of the TB.

Undo each hose by using your plier to ease the clips back so you can pull at the hoses. Put a note on the hose so you know which one goes where. It is fairly easy to remember as the hose closest to the engine side will only really reach near to the side it goes on the IACV.
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Once you undo each one have a towel ready to make sure coolant doesnt spill everywhere.
Quickly grab a bolt to cap off each hose to stop coolant coming out.
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Once capped off you can leave them how they are.

The throttle body is practically off now, all you need to do is remove the wire harnesses going to the IACV and TPS

Note: Leave the TB gasket on the intake manifold as this will be re used, You can replace if you want to however.
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Both these sensors can be unclipped earlier on if you wish to do so.

Now that the throttle body is off the car you need to work on getting the IACV off.

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Here is a photo of my IACV, I have to replace the screws as mine were not coming away so i had to drill a hole through the middle and use a screw extractor to get them out. I wont go into detail at removing the screws but this is why i mentioned needing a drill, screw extractor, wd40 and some replacement screws. I will add the screw sizes to this thread later on.

I would recommend you wd40 these before rounding the screw heads off.

In the photo above i replaced mine with allen style bolts.

If all goes succesful and you remove the screws you should have your idle air control valve off the TB it will look like this

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Grab a rag, TB cleaner and your earbuds and spray and take that dirt away from inside the IACV

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You can use your torx keys to remove the sensor on the side of the IACV, this is not neccesary but will allow you to properly clean the spinning rod inside the IACV.

I had to drill my ones out and replace the screws.

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If you remove the IACV Sensor it will look like above, Be sure not to get anything on this part as im sure it cant do the sensor any good.

Once you have cleaned the IACV thoroughly, You can clean the Throttle body aswell.

Mine was cleaned allready in the photos but it will give you an indication on all the areas to get to, Also the lower part of the throttle body which connects up to the IACV is a good place to clean well.

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Clean all the little corners etc (Im OCD so i just took that crap right off)

You can also spin the throttle rotor to open the plate up so you can wipe inside the TB properly.

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Clean the points above.

Once all done you can start to reassemble everything back in reverse order.

Place your new gasket on the layout above, Bolt IACV back in, ensure everything is properly tightened.

Head back to the car with the TB unit and start to assemble everything back together. Ensure all connectors are plugged back in and all bolts are tightened well.

Also ensure that your throttle cable is on properly and your throttle plate is not sitting open. You can also adjust your throttle cable from here if you have any free play in the cable.

Your idle should be much better now.

Hope this DIY helps, I did this in a rush when i saw someones post so pictures arent the best as they are really old.

PS (I had blue hoses as i thought i had a vacuum leak when i kept getting a MAF sensor code, It actually related to my camcon unit being faulty. Once we found out i put my lovely original hoses back in)


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