My car is a 2007 Ford Crown Victoria Police Interceptor. When I turn the key on, the fuel tank needle shows a full tank even though I've driven over 100 miles since the last fill-up. Is the floater in the tank stuck? If yes, is there an easy fix? Could the reason of it be something else?
Years ago Ford issued a Special Service Message regarding slow to respond/erratic fuel gauge readings do to contamination of the fuel sender card.
They recommended using Techron® Concentrate Plus Complete Fuel System Cleaner. Let the fuel level get low and add a bottle and then fill the tank.
Do it on 2 consecutive fill ups and it should clean up the fuel sender card
what is a fuel sender "card" Jack? First I've heard this term.
If a picture is worth a thousand words, here's one
My car is a 2007 Ford Crown Victoria Police Interceptor. When I turn the key on, the fuel tank needle shows a full tank even though I've driven over 100 miles since the last fill-up. Is the floater in the tank stuck? If yes, is there an easy fix? Could the reason of it be something else?
It's most likely the sending unit that's wearing out. Gas is a lubricant, that's why the fuel pump works. It's similar to a potentiometer, where the fuel level increases or decreases the resistance as the tank level rises and lowers. It's the same concept as an old dimmer switch for lights. It's pretty much expected after 17 years. Just keep track of your mileage. I have a '99 Ranger whose fuel guage is funky. I fill up every 270 miles after running out of gas and the low gas light didn't come on, once. I still have around a quarter tank at 270 miles.
How to fix it?
How to fix it?
Just a wild guess, if the sending unit is the problem replace it.
How to fix it?
That usually involves taking the entire fuel pump assembly out of the car and replacing it with another OEM assembly, which is a massive pain in the rear. Personally, I'd live with it. My truck's fuel pump sssembly is much easier to replace. It's also inside the gas tank, but there are only a few straps holding it in. It's basically a rectangular box that's in the frame. You can see it when you're fueling up. Compared to just resetting the odometer every time I get gas, there's really no comparison.
Today I've driven a few miles and the needle went down to half tank, which seems accurate to me.
Well no, on a Crown Vic, replacing the sending unit doesn't require to drop the tank, it's accessible from below.
The core car was designed in the 70s, so it would make sense. I messed with a couple fuel pump assemblies when I was a teenager off of then-newer Suburbans. It was all contained inside the gas tank. My uncle broke the new assembly and had a hard time trying to fix it without replacing it again. Little me had the idea of splicing the bad fuel pump and the good assembly into the now-bad assembly. It worked great until the car was totalled two years later, lol.
Today I've driven a few miles and the needle went down to half tank, which seems accurate to me.
I've had this happen to me twice, right after filling up the gas tank(s). It happened on my daily driver and on an old Tacoma I own. The strange thing is that both gauges 'remedied themselves' after several hundred miles of driving. Maybe the gas gauge gremlin will move on in your case too.
