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  #25  
Old 02-03-2013, 03:01 PM
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Re: Use Caution if Using Low Fuel Light to Determine Refueling

Rule of thumb: never let your gas tank get below 1/2 full. You never know when you'll get into a high-speed chase with the cops, and it's just embarrassing to have it end because of an empty tank!
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  #26  
Old 02-03-2013, 03:54 PM
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Re: Use Caution if Using Low Fuel Light to Determine Refueling

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Originally Posted by rovinrail View Post
Rule of thumb: never let your gas tank get below 1/2 full. You never know when you'll get into a high-speed chase with the cops, and it's just embarrassing to have it end because of an empty tank!
Good point if a bit paranoid! But it's also good to know that the Jeep fuel light may be a bit dodgy. In all our cars, my wife and I have always waited for the fuel light to come on. A wise old mechanic advised me to do that. It flushes the gunk in the tank to the fuel filter which is changed regularly. Always filling the tank when still half full allows sludge to build up. Should you ever run low, all the sludge hits the fuel filter at once clogging it. Most people would be horrified to see what's lurking at the bottom of their fuel tanks.
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Old 03-02-2013, 08:43 PM
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Re: Use Caution if Using Low Fuel Light to Determine Refueling

Hey I just seen this thread on wk2 gas light problems.. I was on the pa turnpike today in my 2011 grand cherokee limited with the pentastar and our dash claimed we had 78 miles dte when the jeep shut off.. No gas light no low fuel no warning sign at all, and the needle was above 1/4 tank when it just stopped. This is the first time I have ever ran out of gas, and I was only 6 miles from my exit.. Not happy about this one


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Old 03-02-2013, 08:55 PM
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Re: Use Caution if Using Low Fuel Light to Determine Refueling

I rarely let my cars get less than a quarter of a tank before I'm filling up...
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Old 03-02-2013, 08:55 PM
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Re: Use Caution if Using Low Fuel Light to Determine Refueling

I should add I have never ever ever run out of gas.
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Old 03-02-2013, 08:56 PM
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Re: Use Caution if Using Low Fuel Light to Determine Refueling

Might menion that the pickup sock is generally at the bottom of the tank so all running it out does is to uncover the pump and remove its cooling. Also the 10% ethanol should trap any water in the gas.
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Old 03-02-2013, 09:00 PM
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Re: Use Caution if Using Low Fuel Light to Determine Refueling

I usually don't let it get below 1/4 either, and it wasn't below it on the needle, didnt know I was gonna be 6 miles short of the exit thanks to no warning from my vehicle.. I understand its my fault but I believe I'm having a sensor issue of some sort..
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Old 03-02-2013, 09:01 PM
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Re: Use Caution if Using Low Fuel Light to Determine Refueling

Quote:
Originally Posted by BobT View Post
Good point if a bit paranoid! But it's also good to know that the Jeep fuel light may be a bit dodgy. In all our cars, my wife and I have always waited for the fuel light to come on. A wise old mechanic advised me to do that. It flushes the gunk in the tank to the fuel filter which is changed regularly. Always filling the tank when still half full allows sludge to build up. Should you ever run low, all the sludge hits the fuel filter at once clogging it. Most people would be horrified to see what's lurking at the bottom of their fuel tanks.
I haven't checked on the Jeep yet, but your wise old mechanic might not realize that many fuel filter are now 'lifetime' and never get changed. It's not even that new. My 1987 Bronco II had a permanent fuel filter mounted in the frame rail. I put 168,000 on that one with no problems.


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  #33  
Old 03-03-2013, 11:04 AM
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Re: Use Caution if Using Low Fuel Light to Determine Refueling

You really should never go below 1/4 to 1/8 of a tank. The fuel pump sits in the tank and it uses the fuel to keep the fuel pump motor cool. When you run it below 1/8 of a tank the motor is no longer imersed in fuel and the needed cooling is no more. The cost to replace a fuel pump module is about a grand.
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Old 03-03-2013, 12:03 PM
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Re: Use Caution if Using Low Fuel Light to Determine Refueling

Quote:
Originally Posted by BobT View Post
Good point if a bit paranoid! But it's also good to know that the Jeep fuel light may be a bit dodgy. In all our cars, my wife and I have always waited for the fuel light to come on. A wise old mechanic advised me to do that. It flushes the gunk in the tank to the fuel filter which is changed regularly. Always filling the tank when still half full allows sludge to build up. Should you ever run low, all the sludge hits the fuel filter at once clogging it. Most people would be horrified to see what's lurking at the bottom of their fuel tanks.
I think your wise old mechanic's theory isn't valid. The fuel pickup is always pulling from the bottom of the tank regardless of the fuel level.
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Old 03-03-2013, 12:21 PM
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Re: Use Caution if Using Low Fuel Light to Determine Refueling

I agree it's not good to run below 1/4 tank. Once I ran it 25 miles past where the mte says low fuel and it only took 23g.

So I would take yours in.
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