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Just fitted k&n panel filter to my 172 and it has changed the idle! It used to idle around the 800rpm mark but now it seems to stay just over 500rpm! Is it normal for this to happen? Cheers,
It stays around the 500rpm mark, no jumping around or anything! a work colleague told me that the ecu might just need to learn the new airflow? I know bugger all about cars, this is the start of me learning! Lol