I just installed my new Quadzilla Rail/fuel pressure gauge. The in dash display appears to work as advertised but I only see 2 psi of fuel pressure on the inlet of the CP3 (bango bolt). I put my trusty mechanical test gauge on the port and read a good 9-10psi. I suspect the fuel pressure sending unit is bad or the quadzilla itself is acting up. The rail pressure reads as expected. Has anyone had the same experience? I got an answering machine at Quadzilla tech support.

 

https://www.dieseltruckresource.com/...d.php?t=180174

 

Double check your connections and then make sure you're not using teflon on the sending unit threads.

 

I have the same symtoms, at idle - erratic 0,12,14,6,8,16,20,21........

Did the search and have removed the teflon tape, seems to slow down the sequencing, but still all over the place.
When driving there seems to be a more constant reading, have purchased two new filters from Geno's, hope that will help.

Any further suggestions would be appreciated.

Thanx - Rod