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Seafoam deep creep got a lot of gunk out of my iacv.
First make sure the gasket is good and the filter is clean.spray brake cleaner like crazy in it and let it dry out.then spray some seafoam deep creep in there and let it sit for a while.recleaned it out again and got a lot more gunky black build up.also running seafoam thru the brake booster vacuum line every so often has been keeping it clean as well.last resort you should ever have to buy a new one if these don't work
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