Just leave it alone man....Did that to both of my trucks..Now I wish I hadn't....I;ve heard it said they can cause some MPG loss, but I haven't seen any personally...Then again, neither of my trucks have thrown codes either....

Also, a pet peeve I've noticed, is that after you remove the pump, etc....The fumes kinda start to be a bother...Thats what the system is for...to recirculate the gases into the engine, and make the air cleaner...

So my vote is to just leave it....