after removing my nitrous gauge from my car i think there something wrong with it. I notice that it's sitting at 300 psi rather than 0 psi. I'm trying to sell it but there no point selling it if there something wrong with it. Here's a pic of it

 

my phantom autometer gauge is sitting at Zero right now, when my line is unplugged

 

tap it on the side, kinda hard but don't brake it, it will reset to 0
autometer tend to get stuck alot

 

well i don't think it's stuck. tap it and nothing happen. does anybody know of a way to reset it or is my gauge now have become garbage.

 

still need help

 

i thought you can send it back to autometer if it doesnt read right and theyll give you a new one?