Gas Tank Won't fill all the way - JeepForum.com

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post #1 of 22 Old 12-03-2007, 10:00 AM Thread Starter
jonesy02
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Gas Tank Won't fill all the way

Hey guys, i've come to notice that when i fill my gas tank, the clicker thingy cuts off way before its full. Like 2.75 - 3 Gallons before spilling out.
What could be wrong with it to cause this (this was not from 1 fill or just 1 station, i've been testing it for about a month at lots of different stations, all about the same)

I've checked my build sheet and i'm supposed to have the 19 gallon tank as well.

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post #2 of 22 Old 12-03-2007, 10:03 AM
TheBoogieman
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Don't stick the gas nozzle in so far.I put it just past the openeing flap
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post #3 of 22 Old 12-03-2007, 10:20 AM
beryl
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are you sure your tank is completely empty?

i can get my needle all the way down (1/4" past the E mark) and still go about 20 miles (and still never ran out)

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post #4 of 22 Old 12-03-2007, 10:29 AM
LeatherCharm
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This happened to me the other day. I onyl got it up to 3/4 full when it stopped. Then the next time i started my jeep, it said it was full
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post #5 of 22 Old 12-03-2007, 10:30 AM Thread Starter
jonesy02
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Quote:
Originally Posted by Theboogieman
Don't stick the gas nozzle in so far.I put it just past the openeing flap

I'll try that



For the not being empty all the way, why would that matter when the clicker clicks off? It should click off once it gets to a certain amount of fuel right? I'm not worried about the total amount of fuel going in, that just when it stops auto fueling i can still add almost 3 gallons before gas starts coming out.
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post #6 of 22 Old 12-03-2007, 10:39 AM
Manateu
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Wreck?

I was rear-ended recently and the new tank doesn't hold the same as the OEM. I think the insurance company installed a smaller tank. Did you have a wreck? This was a lesson to always do your own repairs, so you get the right replacement parts.

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post #7 of 22 Old 12-03-2007, 10:43 AM
UnsanePyro
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The same thing happened to me last winter, my tank wouldn't fill up all the way, it would click a couple of gallons short of where it did before. I never found out why. It hasn't happened this year though. Hopefully someone knows why
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post #8 of 22 Old 12-03-2007, 10:43 AM Thread Starter
jonesy02
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Carfax was clean (know that doens't always matter) and it doesn't appear to have had any body work on it.

but it does actually hold 19 gallons, just have to fill last 2.5 - 3 gallons w/o the auto fill thingy on.....
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post #9 of 22 Old 12-03-2007, 10:57 AM
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Quote:
Originally Posted by jesusphreak

but it does actually hold 19 gallons, just have to fill last 2.5 - 3 gallons w/o the auto fill thingy on.....
Mine wont fill when i have the nozzle inserted all the way. I always have to put the nozzle in all the way then pull it out an inch or 2 to get it to fill up. (my brothers and fathers TJ's are the same way)
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post #10 of 22 Old 12-03-2007, 11:00 AM
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Mine will auto shut off immediately if it is inserted all the way. Usually in just far enough so it stays. A few pumps don't like the flow rate at full volume either.

As for teh 19 gallon question; Jeep fuel gages are notoriously pesimistic. At "empty" there is still a good amount of fuel left in the tank.
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post #11 of 22 Old 12-03-2007, 11:07 AM
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The nozzles are designed to turn off with very little backflow so people don't end up pumping gas all over the ground. If the nozzle is in too far and the gas is coming out directly into a turn in the filler hose, the splashing will turn off the nozzle. Also, as your tank fills, a little pressure builds up and can cause the same thing. Just a safety.
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post #12 of 22 Old 12-04-2007, 05:03 PM Thread Starter
jonesy02
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tried today without sticking gas nozzle in all the way, same thing, gas light came on around 200 miles, put in like 12 - 13 gallons before it clicked off. Sounds like I dont have a 19 gallon tank? But i have put 17 - 18 gallons into it before. How does the tank know when to click it off?
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post #13 of 22 Old 12-05-2007, 07:09 AM
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How much gas you can put in is not a good indicator of the size tank you have. Most likely you have a good bit of fuel left in the tank when you are on empty. Jeeps are known to do that. Almost never really empty when it says they are, esp if you go by the light. I have driven well after the light and to the point the needle was almost below the dot for empty and got all of 15 gallons in. If you really want to test it out, get a 5 gallon gas can, fill it and put it in the back. Then drive till you stop. Add the gas and then go fill up. See how many total gallons it takes. Will give you a good idea how how far you can really go after the light also.
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post #14 of 22 Old 12-05-2007, 07:21 AM
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Quote:
Originally Posted by jesusphreak
tried today without sticking gas nozzle in all the way, same thing, gas light came on around 200 miles, put in like 12 - 13 gallons before it clicked off. Sounds like I dont have a 19 gallon tank? But i have put 17 - 18 gallons into it before. How does the tank know when to click it off?
Run it emtpy and youll know for sure. I would bet you have a 19 gallon tank. My light seems to turn on when I have like 5 gallons left int the tank

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post #15 of 22 Old 12-05-2007, 01:15 PM
kevin_dubay00
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When it auto shuts off do you have a full tank?

I noticed at some stations the damn thing would shut off every two seconds when I was just begining to pump (obviously not even close to full). Did some research and found somone said turning the nozzle a bit so it is not perfectly straight down (say like 4oclock position) and pumping like that would stop it and it worked for me.

Can't use autofill but I never do anyhow.
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