I took my car in to get a tune up. Upon pick up I realized it was making a loud rumbling noise. Louder than my usual turbo engine sound. I noticed it got louder, between 35-45 mph. Once on the freeway about 60 mph it kind of goes away but when I slow down and begin to speed up again it comes back. Don't know how else to explain it other than consistent loud rumbling noise.
I'm worried because it didn't make that noise before the tune up.