I Have A Customer With A 2002 Legacy Outback With 78k, The Check Engine Light Comes On With Codes For Number 3 & 4 Cylinders, The Car Also Stumbles And Wants To Stall Once And A While Coming To A Stop And At Times Will Stall. The Car Runs Great All The Time But Only Gives The Problem When Either Slowing To Stop Or At A Complete Stop, I Have Changed The Coil Pack, Plugs & Wires, Last Week I Tried To Change Both Air Flow Sensors (o2 Sensors) The Car Now Runs Much Better With More Power But Still Will Stumble Or Stall While Coming To A Stop...any One Ever See This Before, Any Help Would Be Greately Appreciated.