Alright, i put the pipe fitting in. I had about 130 miles on the tank, and it started to sputter. luckily i was right near a gas station. i Pulled in and filled it up, only gained about 1 mpg.
I used to get about 17/18, now im getting 10. last time was 11. thats a crazy amount to lose. It was to the point where it was smoking out of my hood, where it landed on the manifold. But it hasnt done that since I put the plug in. so idk where it would still be leaking.