2010 Corolla Fuel System

#1
Hi all! Car wouldnt start. Would crank and sputter a bit, but never start. Checked fuses and the basic stuff and worked my way back to the fuel pump. There are two lines going to this pump. A bigger 5/8"ish line and a smaller 1/4" line. I pulled the big one and nothing there...just air. Pulled the small one and got sprayed in the face with gas. :) Left the lines off and cranked it over to see if the pump was pumping gas. Yes...had a mess to clean up. But with the lines off it started and continued to run. I shut the engine off, plugged the fuel lines back in and it is running seemingly fine. Why? Any ideas?

Is the smaller line the supply or return?

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