My fuel pressure gauge has been stuck at 5psi for more than a day. Is this normal? If not then how do i release the pressure so that the gauge can drop back to zero?

 

It could just be residual pressure or it could be a bad pressure gauge. Does your fuel line have a pressure port (Schrader valve) that you could relieve pressure from? You could also unscrew the pressure gauge to see if the gauge drops to zero.