Fuel Tank Ground
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Fuel Tank Ground
Fuel gauge worked fine. Changed tank, sending unit, fuel lines, ground strap (sending unit to fuel line). Now I have a bad ground, cause the gauge is pinned beyond full. Isn't the sending unit also grounded from the tank to the straps to the frame
Mopar Lover
Joined: Apr 2008
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Nope. The tank is insulated via the pads between the straps and the tank. the sending unit is insulated because of the gasket. There is a little metal "strap" that clips onto the fuel line before and after the rubber hose that connects the pick to and the main fuel line. This strap MUST be there.
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I haven't tried the old sender yet cause I don't want to drop the tank if I don't have to. I do have the strap on the sending unit to main fuel line. I think if the gauge is all the way past full that I have a grounding problem. Maybe the insulation on the straps is failing or the gasket on the sending unit isn't seated properly. The sending unit is suppose to work between 0-100 ohms all of my testers say 1K next to ohms so that means 1000 is the minimum?
Mopar Lover
Joined: Apr 2009
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From: Michigan: The First Line of Defense From The Canadians!
See if your testers say or have "auto-ranging", or a "range" button. I hope thats what you were asking re; the tester. Here's two sources about fuel gauges that I keep in my bookmarks, I hope they help you. http://www.moparfins.com/Repairs/Fue...uge_Repair.htm http://auto.howstuffworks.com/fuel-gauge1.htm
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I don't know what you are are working on, But I have read other posts and on other sites that the aftermarket sending units for some mopars are wrong 
. The resistance on the senders are incorrect and will never work properly. If it was mine I would double check the resistance of the new unit to the old one. I also would unhook the wire from the sender and have some one check and see if the reading changes. I also would ground the wire and see if the needle cycles. If not you might have a problem with the lead to the tank itself.
. The resistance on the senders are incorrect and will never work properly. If it was mine I would double check the resistance of the new unit to the old one. I also would unhook the wire from the sender and have some one check and see if the reading changes. I also would ground the wire and see if the needle cycles. If not you might have a problem with the lead to the tank itself.
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mrzods13
Engines, Exhaust and Fuel systems
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Aug 19, 2013 05:48 PM
