Buzzing noise while running
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Buzzing noise while running
Have this buzzing noise. Any ideas? Truck is in high idle in video about 1200 rpm’s. 126,000 miles, fuel filters changed about 1,000 miles ago just started noticing the noise
Last edited by Paul Mattick; Oct 20, 2021 at 06:40 PM. Reason: Added Video
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It didn't change the noise at all doing that.
It's coming more from the secondary fuel filter area.
It's coming more from the secondary fuel filter area.
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Double checked all the fittings and they're snug, no signs of a leak either.
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Fleet Mechanic
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Gotta be a vac leak somewhere, keep feeling around and see if you have a split line. Something is sucking. What happens if you have someone rev the engine?
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It revs up fine, doesn’t seem to affect driveability. The noise is most apparent at 1100-1600 rpms, below or above don’t really notice it
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Might be worth noting that my cold side pipe had 3 cracks in it that I discovered yesterday (happened after using the exhaust brake). But the noise persists after fixing it with a stock replacement.
Fleet Mechanic
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I was meaning does the noise disappear when you have someone rev it and you stand there listening?
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here’s another video, the noise gets really loud on startup after about 20 seconds of running, it’s repeatable on each start.
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Yes I did, I'll change them today and see if it helps. I used the Motorcraft filters from amazon that you usually see recommended online on my last change.
