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GEN 2 (2017-2020) Ford F-150 Raptor Forums
Ford Raptor Engine Discussion and Performance Mods
Engine Hissing Sound
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<blockquote data-quote="ss_raptor" data-source="post: 1218850" data-attributes="member: 24978"><p>I thought it might be a vacuum leak but it's not. This morning I turned the truck on and I didn't hear this nose. Drove 10 miles and I still didn't hear it. After my 40min drive into the office, I get out and hear it. It was definitely not as pronounced as the video I have here. This makes me think this is normal. Almost sounds like there is pressure building up somewhere and when this pressure is released you hear this sound. What I'm not sure of is if its due to the cold weather because I don't think I heard this when it was warm outside.</p></blockquote><p></p>
[QUOTE="ss_raptor, post: 1218850, member: 24978"] I thought it might be a vacuum leak but it's not. This morning I turned the truck on and I didn't hear this nose. Drove 10 miles and I still didn't hear it. After my 40min drive into the office, I get out and hear it. It was definitely not as pronounced as the video I have here. This makes me think this is normal. Almost sounds like there is pressure building up somewhere and when this pressure is released you hear this sound. What I'm not sure of is if its due to the cold weather because I don't think I heard this when it was warm outside. [/QUOTE]
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GEN 2 (2017-2020) Ford F-150 Raptor Forums
Ford Raptor Engine Discussion and Performance Mods
Engine Hissing Sound
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