I have an 07 Impreza
I just had the heads redone and put the motor back
in the car it ran great for a couple hrs the it started
Running on 1 or two cylinders and missing and
would die then I shut off and it runs good for bit and
then does it again it has all new spark plugs and
wires and air filter I'm not sure what to do at this
point also it has all new catalitic converters