1st Problem w/New Truck. Fuel Gauge Going Crazy - Ford Powerstroke Diesel Forum
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Old 03-20-2013, 03:55 PM
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1st Problem w/New Truck. Fuel Gauge Going Crazy

When I bought the truck the owner said the fuel gauge wasnt very accurate, I didnt think much about it at the time. I filled the tank up and have driven 260 miles and still reading just under 3/4 of a tank, and as I drive the truck the gauge continues to rise til it reads full.

I'm guessing the fuel sending unit is shot, but would like to get some more info just to make sure before i drop the the 400 on a new one
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Old 03-21-2013, 08:21 AM
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bump on some help
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Old 03-21-2013, 08:25 AM
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Wish i knew but heres a bump to the top i`m sure someone will chime in
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Old 03-21-2013, 05:54 PM
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try a bump again...
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Old 03-22-2013, 07:45 AM
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Not a lot of help but mine always reads full never moves at all and it is for sure the sending unit. I just use the trip counter and fill up at 350.
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Old 03-22-2013, 10:48 AM
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Mine used to read whackey. Turned out to be a loose connector on the dash module.
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Old 03-22-2013, 02:59 PM
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is there any way to check for sure if its the fuel sending unit
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Old 03-22-2013, 03:22 PM
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I'd have money on the sending unit. I have had two other vehicles that have done the same thing and it was that both times. It could be a lose conection but I doubt it.
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Old 03-22-2013, 04:06 PM
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Now, these units are electronic, not mechanical. Therefore, if you fill it up with the motor still running, the float in the tank rises, and the PCM sees it, but the motor on the gauge is very slow. However, it's not THAT slow.
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