to add more info, it only seems to do this while the engine is HOT. when its cold or just started, it doesnt make the noise. to verify the diagraphm wasnt the problem i removed the new one to ensure it wasnt ripped or damaged. it wasnt. im also noticing sputtering at idle and code p2187/p0507 were c...

I just replaced the whole oil housing unit and within 20minutes the noise came back

i should mention the vacuum from the oil cap is extreme.

hey everyone i never thought id need to make a post on here becuase this website has been extremely helpful. but here i am asking for advice. i recently encountered a broken oil filter housing diaphragm so i replaced the whole housing. previously it was whistling, i knew immediately it was the issue...