hell ya
looked into my lean codes today: top of the list was to check the disa gasket and valve o-ring, but for some reason the 2 screws holding it to the engine are different and one of them is stripped. so i skipped that and sprayed engine cleaner on every tube gasket and boot with no response so it can't be ur average vacuum leak, finally took out the maf and cleaned it. i lose nothing worked gonna have to get the disa off
if everything on that is fine (not likely, i have no maint records on it so it's probably beat and old as stuff) i'll have to do more research
also changed the oil - the new stuff i'm using is great and doesn't burn away after one month like the brand the previous owner swore by - and finally got around to refilling my windshield cleaning juice lol