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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

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  #1  
Old 07-15-2010, 02:37 AM
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I was towing my trailer about 100mi.this weekend. The truck ran good for 1/2. The other 1/2 it was like it was defueling at 2 to 2200 rpm. When it did it would fall on its face.
 
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Old 07-15-2010, 03:14 AM
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sound like you are havin fuel problems whats your fuel pressure
change your fuel filter yo start off
you have a stock pump or an airsog or fass unit
 
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Old 07-15-2010, 04:01 AM
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stock
 
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Old 07-15-2010, 10:14 AM
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get a new fuel filter would be your best bet and make sure that the weep hole isnt letting fuel out on your lift pump.
 
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Old 07-15-2010, 10:34 PM
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Also have a quite poping at hi rpm.
 
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Old 07-15-2010, 11:39 PM
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Possibly OFV
 
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Old 07-16-2010, 07:45 AM
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Originally Posted by tiremann9669
Possibly OFV
x2...............do you have any gauges?
 
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Old 07-16-2010, 09:24 AM
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What is OFV
 
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Old 07-16-2010, 10:14 AM
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Overflow valve it's on the injection pump where the return line comes out it's basically a pressure regulator and if it's bad it's letting too much fuel to just return to the tank.
 
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  #10  
Old 07-16-2010, 10:21 AM
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Thanks
 
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