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Old 05-25-2016, 04:00 PM   #1
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Strange front end noise in my Winnebago

I am running a 2002 Winnebago Journey DL 39 ft. When idling there is a strange loud buzzing noise coming from a cylinder on the firewall just under the steering wheel. This noise cycles on and off about every 4-5 seconds. Cylinder has several hoses on it.
Someone suggested that it is a vacuum control for my dashboard air? Any ideas?

Thanks, Bob (Caballero)
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Old 05-25-2016, 05:59 PM   #2
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A/c pump?
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Old 05-25-2016, 10:02 PM   #3
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Sounds like the vacuum pump for your indash heat/air conditioning. It should not cycle that often. Try pulling the hoses off one at a time and sealing the fitting with your finger. When you find the one that causes the frequent cycling to stop, then trace that vacuum line to try to find the leak.

Old vacuum hoses are prone to get brittle and break.

Fred
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Old 05-25-2016, 10:09 PM   #4
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Had an 04 journey and the vacuum pump would run constantl when I first got it. It was a 90 degree fitting that had a metal tube siliconed into it that was leaking. I resealed the little tube into the 90 and never had another issue. The pump should only run at start up or when you turn one of the a/c heater controls and then only for a short time. You have a leak my friend.
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Old 05-26-2016, 07:48 AM   #5
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sounds to me like you have the chevy and the noise is caused by low brake fluid. Those little valves do leak and when it gets low enough, will lock up parking brake. Real bummer.
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Old 05-26-2016, 09:19 AM   #6
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sounds to me like you have the chevy and the noise is caused by low brake fluid. Those little valves do leak and when it gets low enough, will lock up parking brake. Real bummer.
I do believe he said he has a diesel rig. Not sure how the Chevy system falls into this category.
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Old 05-26-2016, 04:55 PM   #7
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I do believe he said he has a diesel rig. Not sure how the Chevy system falls into this category.
You are so right! Old age plays tricks on me sometimes.
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