Misfiring, please help!

[playastarkz123]

So my car hasnt been in the best condition for while now. I been driving with a horrible boost leak which i just found and fix yesterday. So now although i have no boost leak my car is mifiring really bad. sounds like im running on three cylinders. The car sounds somewhat like a wrx. i thought from running rich for so long (cuz of the boost leak) maybe my fuel filter may be clogged or dirty or maybe i had fouled up plugs. so i changed both of these today but still have the problem.

i am also running pretty lean, sumtimes even under throttle. what could this be?

[playastarkz123]

bump please..any input?

[!Zar!]

Is your car able to hold a stable idle?
If so then you are only stumbling during throttle. Which means you have a boost leak still.

If not, then I suggest you unplug each coil pack/spark plug wire one by one.

Take note if it makes a change in idle. If you notice no change when you unplug any given cylinder then investigate that particular coil/plug.

Do the same for each injector, unplugging one by one.

Take note if it changes anything.

Also try to unplug your maf to notice if you have any change in idle.

[playastarkz123]

its holds a steady idle most of the time, although sometimes when i rev the engine as rpms drop it may drop to a stall unless i tough the cas a little bit. other times it revs up and idles fine at 1k but still has that wierd fluttering noise like a wrx all through the rev and at idle too.

ill try the things you mentioned above, hopefully i figure this out soon.

Do you think that maybe im running so rich that my wideband sees it as lean? i have an safc which is adding fuel but no matter how much i add i still end up with the same result.