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Old 04-22-2012, 03:22 PM   #1
Junior Member
Join Date: Feb 2012
Posts: 2
e450 sucking vacuum at gas cap. IS THIS NORMAL?

Hi everyone,

We are new here but have been fulltimers about 10 yrs ago. We recently bought a 2008 Jayco Melbourne 29D and just love it. I noticed that it has a sucking sound every minute or so at the gas cap and when you take it off it whoooshes air into the tank. It is definately vacuum because I put my nose by the cap and when I release it there is no breeze and no odor. Any input would be appreciated.


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Old 04-23-2012, 08:22 AM   #2
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Location: Saskatoon Sask Canada
Posts: 9,701
Caps can go bad... try replacing it...

2004 Chev Silverado Duramax optioned past the max. 2009 Jayco Eagle 308 RLS 765 watts of solar, 6-6 volt batteries (696 amp hour), 2000 watt (4000 surge) whole house inverter.
175 days boondocking in 2017
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Old 04-23-2012, 10:07 AM   #3
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Join Date: Apr 2011
Location: Jacksonville, NC
Posts: 167
Don't have that issue with our 29D. Only problem we have is fueling. Takes forever shutting off with back pressure. Have checked all lines. Found nothing.
Tom Copeland
2011 Melbourne 29D
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