Hi all had an audi a4 1.8 t sline for a little while now on a 2000 y reg.Last night on the way home in it she started hezurtating on full throttle in 2nd 3rd.Now this morning ive got in it an started it the fans come straight on full and when ive push the throttle it just kept dieing on me.Its not sounding good like maybe an air leak.When i bought it it had a brand new k and n cone air filter on it.Should i take this off and put the stardard air box back on.Anyone got any ideas thanks all