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U can spray a solid 5 sec bjrst kf cleaner in the iqcv tube then reattqch and start the car(apply throttle to help start up) rinse and repaeat. Might not be dirty but the valve is stuck.
As for the coolant hose.....
I have completely deleted coolant hose to my iacv and have 0 issuses idling. Cold start, warm start, all day no problems..solid 900rpm no surging.
Sooo i cant image having them backwards, or kinked causing this problem.
Like 15yrs ago i had an sr setup that ran solid...then just 1 day it started idling high and comen to a stop would just cut off.... i tried everything maf cleaning, swaln out, 2 diffrent iacv, injector seals..etc.. never figured it out..lived with it for like 2 weeks and sold the swap(went rb26) but it drove me crazy i must of pulled the stock intake 10-15 times sorry not tryn to jinx ya
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