caringserv

Hi,

I have a 2002 Audi TT Quartro Coupe 225.

I have noticed that when I fill my gas tank, the fuel gauge saids I am able to get 500-600 miles per tank. Now it never used to say I could get that high. The most I ever get per tank is 400 miles and the fuel unit would say that correctly until now.

Now but the time it gets to 1/4 tank it is correct but until then, the car thinks I can get way more miles that I really can.

HELP! Is there something I am missing or is this a problem I should have corrected at the dealer?

thanks!
mike

BeaverTTon Guy

Mine always shows 285 miles when I fill it up.

TTurbo

of course if you want to do it. I on the other hand would wait until my next service unless it is in another 4,000+ miles. My gauge always calculates 380 when I fill up on one tank of gas. There obviously is something up with yours not reading properly. Good luck.

whodkne

Just depends on how you drive. We have had it close to 1000 miles before on a long downhill stretch.

Lone Starr (Ivan)

Your fuel sending units are failing and may leave you stranded. Get the car to a dealer ASAP.

BillK

The central problem is when you fill the tank, the trip computer uses the most recent average MPG (or instant if you reset it) to calculate miles to empty.

If you set your trip computer to show "instant" mileage, you'll see it ranges anywhere from 4 to 200 MPG.

So if you fill your tank after you've been driving downhill and have an average MPG of 40, you will get 500+ miles to empty; if you fill your tank after a long uphill climb and have been averaging something like 15 MPG, it will give you a range of only 300 miles or so.

Remember that the miles to empty is just an estimate based on your average MPG and how much fuel is left in the tank - a warning many people fail to heed ("it said I had 30 miles left!")

caringserv

Anyway to reset it to go back to original specs? I do mostly city driving so I only get about 400 miles to the tank...

I do always reset my trip odometer after each fill up. Does that effect it?

This just started last week, I have had the car for about 2 months now...

thx
mike

BillK

It's based on the mileage you have been achieving over the last "X" period of time, so the only thing that will really change the miles left is if your driving habits have been particularly good or bad.

FWIW, the number will become more accurate as you drive, since the mileage it's using to calculate the miles left for the tank will have been made up of more of the tank, if that sentence makes any sense. ;-)

So, in short, you've probably just gotten better than usual mileage for your last few tanks, thus the higher range value at fill-up...

john s

Right before driving in to station reset the average gas mileage and drive it with some WOT in high gear. Get it to display a nice low gas mileage like 8 mpg. Now fill your tank up and look at miles to empty.