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post #1 of 12 Old 09-29-2009, 06:51 PM Thread Starter
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Low Fuel Warning light

Does anyone know what is used to trigger the low fuel level warning light on an '05 F250? (long bed with the 38 gallon tank, or maybe its 37 gallons)

I'm guessing it is a certain amount of fuel left in the tank, if that is the case, does anyone know how much is suppose to be left when the light first comes on? Just trying to figure out how quickly I need to refuel once it comes on.

thanks
Bruce

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post #2 of 12 Old 09-29-2009, 07:04 PM
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Not sure, but I very rarely let mine get down that low. 1, you'll inevitably run out sometime, and 2, especially in the winter time it allows condensation to build in the tank. This will either freeze in your lines, or get into your fuel filter and cause other issues.
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post #3 of 12 Old 09-29-2009, 07:20 PM
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^ i second that i always get fuel problems in the winter have to drain the water out a lot

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post #4 of 12 Old 09-29-2009, 07:23 PM
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when the sender gets low, it triggers the light or the gauge triggers the light.

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post #5 of 12 Old 09-29-2009, 07:35 PM
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Quote:
Originally Posted by bas157 View Post
does anyone know how much is suppose to be left when the light first comes on?
thanks
Bruce
On my '06, I'm pretty certain when I have 50 miles left to empty, it triggers the Low Fuel warning light in the message center in the dash.

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post #6 of 12 Old 09-30-2009, 03:57 AM Thread Starter
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Thanks, this is only the second time its come on since I've had the truck so I don't usually let it get that low. low fuel msg came on coming to work today, I'm filling up on the way home so I should be fine, just nice to now how far I can go once it does come on.

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post #7 of 12 Old 09-30-2009, 05:00 AM
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i have a short bed so i have the 29 gal tank and when my light comes on i still have like 7 gal left. but i normally don't let it get that low.

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post #8 of 12 Old 09-30-2009, 06:26 AM
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Yup, at 50 miles till empty, it will come on.
Becareful....I once ran out of fuel when it said, "20 miles till empty" ....I was pulling a trailer too.

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post #9 of 12 Old 09-30-2009, 06:42 AM
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With my '01 with the 36 gal. tank If I'm running empty I routinely run 100 miles after the light comes on. I don't leave the truck sitting around with low fuel because I like to keep it ready to use and, as others have noted, there are potential issues with condensation. If I'm actually using the truck though I don't want to mess around filling it every 400 - 450 miles just because the light comes on. The light's really just a reminder to look at the gauge anyway.

As a moderately interesting aside I had a Lincoln Town Car years ago that had a ridiculously bright low fuel light that would come on at slightly less than half a tank. It was really annoying at night. I think I had that thing a week before I pulled the bulb out.

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post #10 of 12 Old 09-30-2009, 05:13 PM Thread Starter
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Mine is just an XLT so it doesn't tell me how many miles to empty. If I haven't filled up when I get 500 miles on the tank, I start looking to see who's the lowest price.

2005 F-250 supercab longbed 4x4
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