Humming coming from air intake
There is a humming coming from the engine when I stop the RV or when the RV is in idle. This morning i was able to narrow it down to the air intake. When I give the engine just a little gas it goes a...
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I remember the sound always being there. But my wife says she thinks it was louder yesterday on our trip. I think it might have been a little louder. I would describe it as more of a buzz, not a vibration. This morning it was intermittent and would come on and off and then stayed on. It has never done this before and that's why I am a little worried. I think it is air going through the throttle body but it is a distinct sound. Is there a fan that blows are into the throttle body or does it just suck the air in? Sorry for my ignorance.
