Gas Guage Reads 3/4 full at fill up. - Diesel Forum

klutz1 · 05-19-2006, 06:56 PM

Yeah, got problems. Fill up and the tank reads 3/4. What to do?? Any one else have that problems? [img]/ubbthreads/images/graemlins/shrug.gif[/img]

Capn Bob · 05-19-2006, 07:31 PM

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Yeah, got problems. Fill up and the tank reads 3/4. What to do?? Any one else have that problems? [img]/ubbthreads/images/graemlins/shrug.gif[/img]

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Haven't had quite that problem but mine is off a bit at the lower end. The Transfer Flow guys indicated that any over filling will mess up their gauges and Fords will probably do likewise. Of course I had squeezed that last bit in a few times and it could be the problem. I suspect it may only be cured by replacement. I'm not that concerned about mine but I'll be watching to see if anyone else here has a better solution. Good luck.

NCHornet · 05-19-2006, 08:33 PM

are you shutting the truck off at fill up? If I don't it can take 20 miles for the needle to come up to full. maybe a stuck float.

Old_Dog · 05-20-2006, 02:43 AM

I've had this problem four or five times. I do think its related to filling
the tank up to the max. Especially when the truck isn't level and the
driver's side is slightly higher than the passenger side. I've had the
fuel gauge do weird things -- like read half-full after filling to the
neck. Then it will take 20 to 30-miles of driving for the gauge to slowly
creep up to the full mark. Meanwhile, the overhead "Miles to Go" is
more/less reading correctly. I.e., it recognized that the tank was just
filled and shows somewhere around 700-miles to go, in accordance with the
most recent average MPGs.

I've also had the fuel gauge swing between empty and full a couple of
times after filling up. Like it doesn't know what to do. And one time
it just stayed on empty after I filled up. Then slowly came up as I drove
the truck.

Now -- just a little while ago, I cranked the truck up to drive it into my
shop to look at putting the OilGuard filter on it. So I drove it a
few hundred feet to the shop, parked it with the engine running, opened
the garage door, got back in the truck and I noticed that the temperature
gauge was right up to the "normal" operating temperature spot! I did a
double take on that. The truck had been parked for a couple of days and
the engine was just now running for maybe three minutes... No way would
it go from cold to normal temp in three minutes. So after I drove it into
the shop I turned the engine off. Then cranked it back up again and the
temperature gauge read COLD... So -- yet another intermittent gauge
problem.

Its possible the fuel and temperature gauge problems are related -- maybe
flaky connections in the instrument cluster. But more likely they're
separate problems. Again, I think the flaky fuel gauge hasta do with
filling the tank to the max...

--Old_Dog

Tina · 05-20-2006, 09:09 AM

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Fill up and the tank reads 3/4. What to do?? Any one else have that problems?

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I have this every time I fill up. But for me it's completely NORMAL!!! I do not shut off the truck when I fill up, I leave it running. This will cause the fuel gauge to SLOWLY register that it's been filled. Usually takes a few minutes of driving after I leave the gas station for the gauge to register completely full. And I do fill up to where I can see the diesel in the filler neck.
Question: is your gauge eventually coming up to the full mark???

klutz1 · 05-24-2006, 10:30 AM

Thanks for all the input. Kept truck running once on fill up 2 years ago and did get faulse reading. Gauge fnally did return normal. So that part I know. This is new problem that just started. Can't say I overfilled but don't know.I will keep observing and report. Next I will disconnect and reconnect batteries to get the computer to relearn. [img]/ubbthreads/images/graemlins/depressed.gif[/img]