Here’s the latest reader question, along with my reply!
Sherri asks: Why did they put the little “catch” in the fuel tank so you need a special funnel to fill the tank with diesel? Is there a nozzle we can put on our diesel tank that will allow us to fill the tank without using the funnel and still fill our other diesel vehicles normally? I believe there is a way to disable this, but I hate to hack a new vehicle.
My reply: I’ve dealt with this myself; the problem derives from two things. The first thing is that some diesel pumps have larger diameter nozzles meant for big rigs and trucks and for this reason it makes a mess when you try to pump the diesel into a car or a smaller/newer diesel-powered vehicle like the Gladiator. The other problem is idiot-proofing. Some people will pump gas into a diesel. To try to avoid that, modified fill necks have been installed – which also serve as “vapor recovery” devices for emissions control.
The easies way to get around this problem is to find a station that has diesel pumps with nozzles that fit your filler neck; a funnel also helps, of course – and it’s good to have this in a pinch, when the only nozzle you can find doesn’t fit your fill neck.
I would not modify the Jeep’s fill neck as this might result in a code being thrown and the “check engine” light coming on. It might also cause issues with warranty-related repairs, in the event that becomes an issue.
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