I have a groaning noise when I am driving or stopped. It goes "groooooan", the pauses then "groooooan, then pauses. It happens whether I am driving or stopped. I pulled into my driveway put it in park and it stopped. It doesn't always happen but happens often enough.

Any ideas?

 

Try the engine forum, that doesnt sound like an exhaust problem, I'm sure you can get some help in there.