Ok first pls excuse my ignorance. My truck has all of a suden start sounding wierd. It sounds like a loud intake noises. At first i thought it was maby a boost leak. I just installed a riffraff 6637 intake so I thought maby I didnt get it instaled properly. So last night I checked and double checked it. My silicon boots were dirty so I cleaned thos and didnt see any obvious dammage. So i thought maby it just extra intake noise because i just put the new filter on. But this morning when I started my truck it was diffrent. Ok this is when my ignorance comes in. When you start your truck in the morning at first it sound normal then you get the sound like it is a jet engine. Is that the ebpv valve? Anyway this morning it was coming on and off. Any ideas on what I have goin on.