deezulsmoke

Has anyone had any problems with their isspro fuel pressure gauge. I have had mine hooked up for about a month now, and it has always worked really well, and now for some reason it has stopped working, I got it from scheid diesel. I was wondering maybe if it was the fuel pressure isolator. I know the fuel line is still working because you can feel it pulsing when the truck is running. Just wondering if anyone else has ran into this, and what you did to eliminate the problem and figure it out.

thanks,

matt