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

Fuel guage trouble

Old Jan 17, 2009 | 11:53 PM
  #1  
razorrodent's Avatar
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From: Myrtle Beach, SC
Default Fuel guage trouble

My fuel gauge has become completely unreliable lately on my '97 auto. It'll indicate full but get much below that and itll swing all over the place and now will show empty when I've get 20 gallons or more still in the tank. Thank goodness I have a scangauge which can keep track of gallons used and left. Any idea whats going on and how to fix it.
 
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Old Jan 18, 2009 | 12:00 AM
  #2  
wildbill's Avatar
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From: Billlings, MT
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Sounds like a faulty sending unit or a blown fuse.
 
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Old Jan 18, 2009 | 01:20 PM
  #3  
big_dog37074's Avatar
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Thay are bad about that just like the oil gauge too. pull the bed and put a new sending unit in.
 
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Old Jan 18, 2009 | 01:26 PM
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Heath's Avatar
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From: Mason City, Iowa
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Agree, sending unit. $100 last I checked, $200 installed. Probably higher today/?
 
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Old Jan 18, 2009 | 02:01 PM
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razorrodent's Avatar
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OH JOY!!
 
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Old Jan 11, 2010 | 07:59 PM
  #6  
hop sing's Avatar
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From: lynden wa,maui,hawai
Default gas gauge

were did u get your gas scanner to keep track of gallons u have left thx
 
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Old Jan 12, 2010 | 06:54 AM
  #7  
PhilipR's Avatar
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You can get a sending unit for $50 from the dealer.....anything more that that and they are trying to sell you the entire module and sticking it to ya.
 
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