ok... so here is the deal, my b16 idles irraticly, when the engine is at idle temp it will idle below 1000 rpms but will drop down to what i think is 450 rpms and then rev it self back up to about 850 to maybe 1000 rpms.... my guess is its the fuel fillter or my iacv have finally gone kaput!!

any other opinions will be very helpful!!

 

my b18 dos the same thing