Ok so I found my exhaust leak today now I have a question. Could this be why my car idles rough? When it's going it runs smooth but when I stop the idle will start dipping down (sometimes it almost cuts out and it'll dim the lights it drops so low) This is driving me insane. I've changed hella vac lines and cleaned up my grounds. Anyone?

 

An exaust leak wouldn't have anything to do with a poor running engine, unless it is before the cats andis being caused by clogged cats.

 

It is before the cat. I wonder if you're onto something......