Gasman777

2007 F-150, 4.7L, 2WD. When I accelerate it sounds like there is something wrong with my exhaust, sounds like its coming from front driver side and it sounds like rattling rocks in a coke can. Sound isn't as noticeable at idle or until you put it into gear and drive off. I've crawled under there looking for anything loose and didn't see anything. Also, when you rev the engine while in park it doesn't seem near as noticeable.

Probably completely unrelated but 2 weeks ago I had to change my EGR valve and do a throttle body cleaning. any ideas on this sound, possibly the cat?

Thanks in advance.

melrose99

I would guess cat