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Lately I've had this buzzing noise under the hood, and after some searching I've narrowed it down to the hose that leads from the PCV in the valve cover to the throttle body.
It is obvious that I'll be swapping out the PCV, but why would it be buzzing? Anything else I should be looking for?
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.