Fitted my gauges today all are working except oil pressure the gauge reads 0psi start up sequence is all or any help would be great

 

a bit info on how you fitted it may help, i.e sandwich plate or under alternator, but I would suggest the connector at the back of the gauge first port of call

 

It's fitted under the alternator with a fitting kit with the wires pluged into sensor and in the back of the gauge correctly

 

Is it a stepper gauge.
The non steppers use a cheapy sender (large round silver thing with two thumb screws on it ).
If its this sender then make sure the wires are on the correct terminals and the negative goes to a good earth in the engine bay.