I have a 2002 7.3 runs great, no real issues, no leaks. However when i start the truck and let it warm up it after about 3 to 5 minutes it starts a awful hissing sound out the tailpipe. the truck rpm do not change and i can see the rod on the ebpv moving in and out. this continues until i hit the brake or throttle. sometimes the high idel will kick on and this wont happen until after the truck is at normal idel. I am geussing this is all caused by the ebpv, i was told it could be the solinoid? and i was also told to just unplug the ebpv? Im not sure what is best to do, it clearly functions just is not working correctly and kinda surges. If theres no downfall in unplugging it i wouldnt mind not hearing the loud sound.