I hope you guys can help me. I just bought a 1995 subaru imprezza outback, It has high miles i think its like 150,000 miles on it. The guy i bought it off of couldnt fingure out why it didnt have any power. He told me the catlylitic converter might be cloged but they wasnt. WHAT i mean by it not having power its like its running on 2 cylonders instead of 4. so i bought new plugs and wire put them on and it still run like shit. so i thought maybe its the corel the little square box that the wires from the spark plugs goes on. when i had the car running i took the spark plug wires off in the front and the engine almost died. so i knew that i was getting spark there when i took the wires off of the back the engine didnt do anything diff. could it be the coral box or could it be a head gasket

Optional Information:
1995 Subaru imprezza not sure

Already Tried:
i had the catlylitic converter check they was ok