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  1. Hello all: Been creeping the forums for awhile, Have tried several fixes but with some slight performance . First car is a subbie impreza outback sport, 2.2 with air. This is my daily work driver 100 miles a day interstate driving. I started when I was going to leave work i just started the car and it stuttered and started to stall. I then shot the pedal to it and it started running better on the drive home it developed a stutter or miss at 1500 and 2500 rpms. When it is running it is fine until it hits the revs listed then it stutters and as it passes the target area it clears and runs better. I went and to it to a local mechanic and he put it on a code reader and it was popping MAF. SO with that being said I started the dreadful sensr change. I changed all the sensors, IAC , crankshaft, camshaft, temp sending and relocated the anti-knock sensor to the back of the block. I also replaced the MAF and it still pops when it gets put on the tester. The Coil pack has been replaced and the ignitor also. New wires and plugs, I also sea foamed the engine so im leaning towards it jumped time or a Vac leak? I have also changed out the fuel filter and Marvel mystery oil the fuel. it is sporting 165k and has had a new belt, water pump and thermo within the last 30k.. doesn't run hot but has a low idle. the comp was cleared and reset but now I am just at a loss of where to go or direction. Any help would be greatly appreciated... I aslo checked all the grounds and cleaned them.