Your Rav4's throttle body looks way filthier than any I have seen on several salvage yard Rav4.1s in the last few years and on my own Rav4. Hopefully this filth turns out to be thee problem and the throttle body and IAC valve can clean up nice.
In my throttle body adventures, I am aware that there is "carburetor cleaner" and also "throttle body cleaner" sold at places like Autozone and Wal-Mart. I have taken to using the cleaner that is more specific to the part. I try to be mindful of not spraying any electrical contacts or rubber parts with the cleaner.
I think the video by Aussie50 (cool guy) you linked is great, but I would take a look at demoder's video as well. I think demoder's video focuses more on carbon buildup (as opposed to coolant sludge yada) in the IAC valve. See about 16:00 to 17:30 in demoder's video.
Demoder's comment about JIS screws was instructive. I think it explains why Aussie50 (and myself) often find the IAC valve screws stripped. (Okay, I may have stripped a few through ignorance about JIS screws vs. Phillips head screws.)
I am not sure of the hose diameter. I'd likely cut the old hose towards the center of the length and measure it. Or I'd take the old hose with me to Napa or Autozone.
I think this is a good discussion of the IAC valve coolant hoses and some local options:
BMR and fellow associates!:grin: Before I post over at the "What did you do to your GEN3 Camry" thread, I am asking some expert opinions on selection of hose material for the Idle Control Valve (IAC) Water bypass application. At first the replacement hoses from Toyota Dealer quoted me a...
Silicone hoses appear to be worth considering. But I would want the silicone hose manufacturer to be crystal clear that the hose is designed for coolant systems.
I would triple check any substitute hose that Autozone suggests, by googling on the identifying information printed on the hose.
I think I'd go to my local dealer and see how quickly they could get the hoses for me.
For the archives: Long time member Eodgator talks about replacing coolant lines (inclulding the IACV coolant hoses) with "Autobahn88 PTFE Teflon Hose with High Tensile Stainless Steel Braided (Single Layer) fits for Fluids : Fuel, Oil, Water, Coolant, Methanol. Silver" (or whatever is the equivalent in the correct diameter): Photo from Amazon:
For more detail see Eodgator's post at
. PTFE hose fittings are needed. Youtube has some videos on installing the fittings.