issopro fuel gauge

[JPack]

Hello to all. I'm new the site,I've installed the Vulcan relocation kitand gauge. I'm having a problem with the erratic readings on the gauge.On the first startup I had 13.5 @ idle 11 at 2000 rpm. While driving 12 miles to work the gauge suddenly shot up to 24psi and wouldn't go down. I got another gauge and hooked it up 12.5 @ idle 11 2000rpm. It worked for fine for a full day,then I got home and this gauge started to read 24 psi. I've got the isolator mounted in the verticle position.I've got most of the air out on the gauge side. I've opened the screw to bleed the air out of fuel side.I would appreciate your comments. Thanks.