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Old 03-24-2019, 07:37 AM   #1
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Replacing Fuel Sender Assembly

1990 Ford B700 6.6 l (mechanical)

Quick question about replacing the fuel sender unit. Is it as easy as simply removing the old unit and putting in the new one and just putting the fuel hose back on? After filling the tank the other day she quit reading anything. The tank is full.

Any hints or tips? I did leave the interior access hole. Thanks.
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Old 03-24-2019, 11:16 AM   #2
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Should be, yes. You might even find it to be nothing more than a loose/broken wire. Many times the fuel line is separate from the fuel level sending unit so you won't even have to remove it.
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Old 03-24-2019, 11:37 AM   #3
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Quote:
Originally Posted by Brad_SwiftFur View Post
Should be, yes. You might even find it to be nothing more than a loose/broken wire. Many times the fuel line is separate from the fuel level sending unit so you won't even have to remove it.
Thank you. I'll dig around in there before I buy a new assembly.
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Old 03-24-2019, 12:18 PM   #4
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Occasionally these may develop a "dead spot" at full/empty tanks. You may find it starts working at 3/4 tank or something.


Also, different manufacturers may use different resistance ratings for full/empty readings in the tank, make sure your new sending unit matches what Ford(?) used.
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Old 03-24-2019, 12:27 PM   #5
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You absolutely must match the ohms range for the sender to the gauge. If unknown or unmarked the gauge can be tested for on any ohm meter.
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