Dragon gauge cheep I know lol!
 

Hello people hope u are all good I'm having some trouble with these dials has anyone else fitted these mine is a oil pressure one it reads on first ignition then on second it defaults back to 120 all the time also it does the same when it's started default to 120 then if I turn engine off I get Reading god knows why. I have tried wiring it all sorts of ways bearing in mind there are only 3 wires one red + one black- and 1 green to sender u can't get it wrong really or am I totally stupid lol

Either the sender, or the gauge is faulty then?

Has to be the gauge then I have tried two senders and no luck with either thanks that's what I'm thinking ****ing junk lol

Pot luck, really, you could buy the same and it work faultlessly.