New gas tank

It's been a very long time since I have posted. My fox, that I have had since 2000 had some rott on the passenger side shock tower. The old 302 was also leaking from the rear main. I pulled the motor and had the shock tower fixed. Since the motor was out, I decided to put in a 331 stroker. The car has been out of commission for 18 months.

A huge thanks to the guys who set up the surging idle check list and the cranks but does not start check list! A long story short, the main ground was stuffed down in the fender apron, so it did not even crank. I found that, and screwed it into the block and the car would turn over. Then the fuel pump would run continuously. Turned out to be bad capacitors in the ECM. The car was not getting spark. Turned out to be the TFI Module. The car would start but not idle. The IAC was bad. I could get it to idle, but it liked to die! I reset the base idle, and it idles like a champ! I finally took the car out, and it stalled coming to a stop. The VSS was bad. I replaced that, and now the car drives great!

Which leads me to this. During this process I put a new gas tank in. It had an 1/8 of a tank while I was working on all the issues. I took it to the gas station yesterday and filled it up. It leaked very badly from the middle of the tank. The fuel was coming through the middle vents on the plastic case holding the tank. The filler neck gasket is also brand new and was bone dry. I scoped the top of the tank. I couldn't see much. The return lines...I believe were also dry. It leaked until it was at 3/4 of a tank. Does anyone have an idea what is causing the leak? Could it just be a bad tank? I'll also be calling LMR about this.

Thanks!
Nick

Thanks for the advice! When I say leaking, I mean pouring! I still have half a tank to burn through before I drop the tank. The amount that poured out was shocking. The fuel neck grommet was dry and it was pouring from a different spot. I’ll definitely take a look at it when I drop the tank.