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12 Valve 2nd Gen Dodge Cummins 94-98 Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with P7100 Injection Pumps

no air

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  #1  
Old 12-07-2009, 01:10 AM
adub12valve's Avatar
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Default no air
hey i have a 98 12 valve, and the it blows air but only out of the vents, no matter what setting it is on or hot or cold. any help is appreciated
thanks andrew
 
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  #2  
Old 12-07-2009, 12:02 PM
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had same problem on my 1st gen changed my heater and a/c control unit fixed the problem
 
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  #3  
Old 12-07-2009, 06:14 PM
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ok i will try that when i go home, thanks
 
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  #4  
Old 12-07-2009, 06:16 PM
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Check all vac lines to. Got one disconnected/rotted somewhere.
 
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  #5  
Old 12-07-2009, 06:26 PM
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i took off the vac for the 4 wheel drive, would that have made it not work?
 
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  #6  
Old 12-07-2009, 06:27 PM
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Did you plug the end of the hose??
 
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  #7  
Old 12-08-2009, 11:53 AM
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i think we might have, could that be it?
 
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Old 12-09-2009, 12:18 PM
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Check and see if there is any suction at the vac pump.
 
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  #9  
Old 12-09-2009, 04:29 PM
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Originally Posted by wildbill
Check all vac lines to. Got one disconnected/rotted somewhere.
X2 Yea check the vac lines
 
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