Had the dreaded "Check Engine" light pop up this weekend. My '07 3.7 threw a P0507 so I popped the hood and listened for vacuum leak. I have noticed a small drop in power and fuel efficiency as well. Do you think this could be my problem??? BTW, the other end of the hose is also cracked at the fitting. I've already ordered a new hose and I'm going to go ahead and change the pcv valve while I'm at it. Anyone have any ideas of what happened? I feel like I should have had a light WAY before it got to this point.