Common fault codes for subaru legacy

something that wont throw a fault code
i am thinking coil and plugs
even fuel pump relay or bad fuel

engine bay picture removed
2005 subaru legacy

is yours the turbo motor .. could be turbo related

Could be a faulty O2 sensor. The sensor would not take action until the engine warmed up. Have you checked for trouble codes in the engine computer ?

have the fault codes read first
if the transmission oil has not been changed , that would be a good move after reading the fault codes

hi it sounds like a sensor may be faulty or getting worn, luckily you dont need equipment to check codes, look under the dash on drivers side and you will see 2 small black plugs close together plug them in with the car off but key on acc and the check light will flash codes, slow then fast. for example if 4 times slow then 2 times fast it means code 42 then just google it for the code meanings

THE CHECK ENGINE LIGHT COMES ON TO INDICATE THAT A FAULT HAS OCCURRED IN THE ELECTRONIC ENGINE OR EMISSION CONTROL SYSTEM, WHEN THIS LIGHT COMES ON A FAULT CODE IS RECORDED IN THE MEEMORY OF THE COMPUTER, YOU NEED TO HAVE THE COMPUTER SCANNED TO FIND OUT WHAT THIS FAULT CODE IS DO PROPER DIAGNOSIS AND TESTING CAN BE DONE TO CORRECT THE PROBLEM, COMMON FAULTS ARE DEFECTIVE O2 SENSORS ON THIS MODEL.

I have the same problem!Running on three.I have checked compression,wires,plugs.Changed injecters,plugs.
3 mech.cant figuire it out???

coolant senor

hi i had that fault i found it was a small box the size of a fifty pence on the osf with a small air pipe coming from the bottom of it try a run the car then take the pipe of if its working you will see the change in the engine

any check engine code?

A check eng lite will very seldom cause any drive-ability concern, you most likely have an intermittent fault like a O2 sensor, have Kragen run a self test for a trouble code, it's fun and it's free!