Cleaning the IACV (the Idle Air Controller Valve).

It is located under the Throttle System cover / hood, just beside the engine block, with a cable (throttle cable) that spans out almost half of the engine bay going into it.

All you have to do is:-

1) Buy Carbon spray cleaner. STP is a good brand - the Carb Spray Cleaner. 500ml for RM15.00. Can be used, at least 10 times, if just used for the IACV cleansing. Make sure you read the back label carefully. Someone used petrol and brushes but I recommend using the aerosol spray. It makes the job a LOT easier.

2) Screw off the Torx25 screw holding the Throttle System cover / hood in place. Slowly remove the cover by tilting it upwards a bit and pulling it backwards.

3) There is a small metal silver-coloured, bottle-shaped thingy that looks like it is lying horizontally. This is the IACV. It will have two hollow 'hands' - the one pointing to the top is smaller than the one pointing to the bottom.

4) Remove the top connection. Depending on whether you or your mechanic have done this before, the metal fasteners are normally different. IF you havent, then slowly but firmly or forcefully remove the metal fasteners. This may cause the metal fasteners to be damaged.

5) Remove the bottom connection. Instructions as with the removal of the top.

6) Remove the IACV. You may find it easier to let the IACV slip out by turning the unit and pulling it out slowly. Inspect manually. If you slowly turn the IACV horizontally, you will feel like something inside is 'moving' with sounds of click, click at each turn.

7) Look at the hollow holes at each 'hand'. Typically the one pointing to the top is less dirty than the one pointing to the bottom. The dirt inside the holes are carbon deposits that have come to reside within in. THese are the bad stuff that we are aiming to get rid of by eliminating them via the use of the aerosol spray.

8) Carefully spray into the holes using the tip nozzle provided. Aim well. Avoid the spray getting into your eyes. They are hazardous.

9) Make sure the holes are clean.

10) Air-dry the IACV. Tip it in such a way that whatever liquid is left, it would naturally flow down by gravity-pull. The whole air-drying process shouldn't take more than 10 minutes. While waiting, you could use this time to clean the other parts related to the throttle with your multi-purpose rags. :)

11) Reinstall the IACV.

12) If your metal fasteners have gone bad due to your opening it up, or if you couldn't get it to 'lock' again, since you don't have the special tool: Go to your supermarket and buy those metal fasteners that you could affix to your tap nozzle of your garden hose. If you do, you will need either a small ratchet with the head number 7 or implies a 7mm. Or you can use a locked spanner (preferred to help not damage the nut-head) size 7mm. Affix it in alternate to the original Volvo metal fastener.

13) Fix the bottom part first and then the top one. Then screw-tighten the metal fasteners back into place.

14) Next, re-affix the cover.

15) Star your engine and observe the idling now.


:)

Very easy, right? Hope you could find your way!
:)


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:)

Hopefully this time, both the photos would emerge.




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