SO check it out the stang is making a weird kinda metal banging noise when I am idling, like a really loud ticking sorta and like someone is hitting the engine with a metal object, when I put it in gear it goes away. Periodically it will make the noise and its almost like the engine wants to stall but doesnt. The car idles rough and drives semi rough at speeds under 50. It kinda seems like a blown head gasket but it isnt smoking out of the exhaust and it doesnt seem like I am loosing coolant any help?