Well I have multiple problems but the first one is there's a ticking sound coming from inside the engine bay on the passenger side. I smell exhaust too, I'm assuming it the headers but I've check and I can't find a vacuum leak. Second problem : I have a low rpm when idling...something around 600-700 and a bit sluggish when you step on the gas. Third problem : if I come to a complete stop and quickly press on the gas the car sounds like it chokes for a split second and then takes off. My question is how do I go about finding these problems and fixing them?