I purchased a 1993 Integra GS sedan, and shortly after I filled it up with gas for the first time, it leaked out until it was at about half a tank (or at least read half a tank on the gauge.) It repeats this any time I fill it above half a tank, and the leak is somewhere on the drivers side rear, it looks like it's the tank, but I can't seem to locate a hole or crack. Would there be any more possible spots for a leak to happen that would cause similar results? Would like to know before I drop $100 on a new tank since I can't find any junkyards that have one near me. It will also spill a little more gas if I jack the front up or drive fast.

 

Check the feed and return lines,

You can seal the crack with JB fuel tank weld putty its made for this job. About $5 Find it online or Napa etc..

 

What's the best way to check the lines?

 

Your gonna need to fill it up and jack the car up and find the physical leak, it could be more than one area. Pin point the leak.