so i was tightening the fitting on the pressure gauge to the outer thread of the schrader valve, and it broke of inside the female connector on the gauge. but no gas came out, i kept putting it in run while i was tightening it to check. but now that just the needle's there, i can push the needle in and gas comes out, just no way to measure it's pressure.
is this a replaceable part? i couldnt find any avalible online.

 

You can replace that section of fuel line or the fuel rail it's attached to. You MIGHT be able to remove just the fitting assembly from another line from a scrapyard. You can also buy an inline fuel pressure test port that you connect inline with the existing plumbing of the vehicle. Shop around at places that sell premium pressure test kits, some kits come with it.