Okay, I changed engines. Same engine went in that came out, as far as size. No great modifications. For some reason, it is drinking gas like it is going out of style. Any clues?

 

Can't possibly tell you without knowing what kind of car,engine,and transmission combination.
It could be anything from a dirty air filter to dragging brakes.

 

Does it smell like gas around the car??? May have a leak somewhere...

 

is the check engine light on?? i had a mass airflow sensor go on me and then it rank gas like crazy cuz it wasnt geting the proper fuel to air ratio

 

Do the following. Change the Air filter/plugs/MAF and you should see an improvement in MPG.

 

if possible, install a locking gas cap.

 

How is it possible to describe a solution to a problem if you guys do not know all of the facts? what year? engine? what mods does she have? does she see any leaks? we all can speculate but c'mon! ask more questions before telling someone what do you think is wrong with their car.
Just my 2 cents.

 

I don't see anything wrong with throwing out some basic general ideas... Doesn't matter what you have, if the air filter is plugged, it's plugged... If you got a leak, it doesn't matter if it's stroked 347 or bone stock 4.8, you still got a leak...

 

all they can do right now is toss out some basics. I'm having a smilar problem but i think ill start my own topic later after i try a few things. 9mpg on a 302 with a 2b carb will not cut it

 

Sorry guys, I wasnt thinking.

4.6 out of a 2000 GT into a 2000 GT. Automatic transmission. It seems to be doing better now for some reason. I am going to keep an eye on it. Thanks for the info and I will keep that in mind should it start up again.
MustangMom