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24 Valve 2nd Gen Dodge Cummins 98.5-02 Discussion of 24 Valve 5.9 Liter Dodge Cummins Diesels with VP44 Injection Pumps
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What would cause my fuel tank to be pressurized?

   
Old Feb 20, 2011 | 10:39 PM
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Default What would cause my fuel tank to be pressurized?
What wud cause my fuel tank to be pressurized?
 
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Old Feb 20, 2011 | 10:43 PM
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The roll over valve is clogged and not venting the way it should. There's a whole long thread of mine here someplace with this same issue.
 
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Old Feb 21, 2011 | 07:54 AM
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Are you noticing all this pressure when you take your fuel filler cap off? I'd be looking at the fuel cap if that's the situation.

Could this be what you are thinking about:
https://www.dieselbombers.com/dodge-...el-system.html
 
Last edited by RAW; Feb 21, 2011 at 08:01 AM.
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Old Feb 21, 2011 | 09:45 AM
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Are you positive its pressure? We have had problems with a vacuum building up in the tank, that can cause problems.
 
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Old Feb 21, 2011 | 12:07 PM
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it seems as its sucking air in when i take the cap off, and then diesel vapor comes out
 
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Old Feb 21, 2011 | 01:14 PM
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Yea thats a vacuum in the tank, its just not venting right.
 
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Old Feb 21, 2011 | 10:13 PM
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So new cap? or try driving with it loose and see if that fixes it, then a new cap?
 
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Old Feb 22, 2011 | 08:35 AM
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You could try driving around with the cap loose, or off to see if it makes a difference. I will almost guarantee it will though.
 
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Old Feb 22, 2011 | 12:06 PM
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Sweet! I hope that is the problem
 
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Old Feb 22, 2011 | 12:40 PM
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Go to the junk yard and get a cap for $5. Imo
 
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