Originally posted by svtavino:
Originally posted by rozwell911:
I have a 1999 SVT, and I just replaced the fuel pump and sender unit. AND now it seems like Im getting bad fuel milage too. Originaly I had a bad sneding unit. ANd IO know this one is funtioning normal.

What would cause this bad mileage? Could my previous Sender have been that bad??


Roz


The sending unit has nothing to do with your mileage. It is just part of the guage to give you an estimate of what is in your gas tank. Since your pump was replaced and if the old was really bad maybe this one is pumping more fuel and causing it to get a little lower mpg running rich. The computer will compensate for it and it should be back to what ever you were getting before after a tank. Plus if your other card was faulty then this one will defenitly show a diffrent reading on the guage. Both my SVT and Wifes Mystique get 22 to 28 mpg depending on driving. I check it everytime I fill up.




Oh I understand that the sending unit has nothiong to do with the pump,or losing millage, I was just wondering if the sending units false readings are bad enough so that i could never accuratly see how much gas I have at any give millage.


Example.
before: i could go 120 miles on a 1/4 tank.


after:I can only get between 70 and 100 on a 1/4 tank.

So what im thinking is that my sending unit was really bad and I never could estimalte the correct millage.

Roz

3.0 SVT hybrid...all the fixens...Track/Race ready very soon!!!!!! 20,000 + miles