aaron.cavosie Posted October 13, 2013 Share Posted October 13, 2013 Hi folks, I'm still chasing down a P1507, and today I pulled my IACV . I read that cleaning the IACV might fix a P1507 (assuming its gunked up), so I went for it. I bought the gasket in advance (its flat with two holes and four screw holes). I had read about cleaning IACV on Subaru forums (such as here: http://forums.nasioc.com/forums/showthread.php?t=781242), including tips about using Q-tips etc. I also checked to make sure I had the right voltage on the incoming wire (yes), and that the proper resistance existed across the 3 pins (~10 ohm). These were fine. When I pulled the thing, I was... underwhelmed. I was anticipating seeing a disgusting carbon/oily mess, but there really wasn't much to see. The exposed hole is rather small- an almost square openining, that is about an inch on each side (2 x 2.5 mm). There really isn't much exposed to clean. The nasioc post describes one person's method of filling it with gasoline to clean it- but this seems to require (1) plugging the large vac hose nipple on the opposite side of the IACV, lest the gas drain out, and (2) does filling it with gasoline affect the solenoid interface? I can imagine that the 'fill it with gas' method might be more effective, as I can't imagine getting very far with Q-tips. Any thoughts about this? Perhaps the Q-tip method is better for other years...Anyone had good experience cleaning their IACV for a 98? Another thing was that the gasket I bought in advance looks very much like the one that is (still) on the throttle body (this is good), but it looks like there is some kind of red 'gasket-seal' between the old gasket and the throttle body. None of the books or on-line advice talked about needing to seal the new gasket onto the throttle body- is this recommended, or not necessary. Opinions? At the moment, the IACV is sitting next to me, laughing at me because I'm not sure I know how best to clean it. I would appreciate any thoughts on this issue. Aaron Link to comment Share on other sites More sharing options...
IrishLt Posted October 13, 2013 Share Posted October 13, 2013 Should mostly be dust that you're hunting in the IAC. Make sure what ever you decide to use evaporates without leaving residue. iac valves can be some of the most temperamental parts. As far as methods. Can't really speak for one way or another. Personally, yank the electronics off it. Spray, spin valve, repeat till it turns like butter. Just my .02$ annnd it's usually not worth that even to me. Goodluck -Lt PS-Not sure if you read up on alignment, but if you pull the electronic cap off it needs to go back on in about the same spot. Link to comment Share on other sites More sharing options...
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