mochaj

well my car has been misfiring on #3 for a while you can feel it at idle but not under power. the CEL has come on a few times and goes off after a while. BUT.... Today i started up the car(it was cold here in colorado this morning) and when it was misfiring i could here a knock. not a ticking like lifters but a friggin Knock like metal on metal. I was pretty low on oil so i added a few quarts(2) and the knock went away. So I'm thinking my misfire has something to do with the valves/head on the #3 cylinder. this car has 110,000 miles on it. I want to take it in but i dont want to spend loads of money on them trying to trouble shoot the problem and after they figure it out after who knows how much cash in T.S. cost they rape me on parts and labor. I just have a strange feeling this is gonna be a very very exspensive endeavor. Does anyone know a good Subaru shop in the Denver area they recommend?