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Old 08-06-2013, 07:18 PM   #1
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Fuel filling and capacity questions

So I have had this 1992 jeep wrangler 2.5 since January and have been slowly restoring it and finally finished it this week. The fuel gauge was on empty so the maiden voyage was to the gas station. I had trouble filling it. I had to hold the gas filler and fold down liscense plate just right to get it to fill with out auto stopping. After I could not get it to fill anymore. It only took 12 gallons and the gas gauge was a little past full. It should have taken 15 gallons! Any tips or reasons why I had these troubles?
Much appreciated, Robert

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Old 08-06-2013, 07:43 PM   #2
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Most of the 2.5s had the same 20 gallon tank as the 4.0 wranglers, but they just put in a longer vent tube to limit it to 15 gallons. Your vent tube might have slid further into the tank. If you drop the tank (use a good jack with it almost empty!) or remove the fill cap housing and get to it through there, you can pull it out or trim it.

I tried to modify mine to 20 gallons by dropping the tank and cutting the tube. I only cut it enough for 18.5 gals

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Old 08-06-2013, 08:40 PM   #3
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You might have a 15 gallon tank like I do or a 20 gallon rigged to be a 15. Cruddy little Chrysler trick you will learn about on this forum. Anyway, at empty I usually add @ 12 gallons with my 15. I'm sure you are going to learn tons about the intricacies your new ride in short order. Try positioning the gas pump at 5 o'clock when filling. Usually helps
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Old 08-07-2013, 12:25 AM   #4
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First off, Don't feel bad, I have the 20 gallon tank and when reading empty it only takes 17 gallons. I guess that's better running out of gas while the needle still shows gas. These gas gauges are not very accurate.
Second, filling them is a pain, mine works best with the gas pump handle pointing to the 5 o'clock position. I removed my drop down license plate and put it on my rear receiver, I hated the spring plate.
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Old 08-07-2013, 02:34 PM   #5
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Thanks to everybody for the replies. I am looking forward to finding out more about my jeep
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