I am installing a 2 1/16 carbon fiber guage. I wired everything up good and when I ground the sender wire the guage pegs like its suppose to, but when I install it on the sending unit though the guage doesnt move. Does the sending unit have to be grounded or something or installed a certain way? I have mine in a T fitting with temp guage on top and 2 barbed ends on the other sides with 3/8 hose attached. Is this the problem?