Air Zenith 220 PSI gauge issues

Installation Help & Advice Onboard Air & Air Suspension
1

Just bought the Digital 220 PSI gauge earlier this week, and installed it tonight, wired it all correctly and grounded it per the instructions, The gauge is at least 10 PSI off at all times, and as much as 13-14 PSI at times, First time i pumped the tanks up it went nuts and bounced from 110 to 220 and back about 3 times.

Did i miss something or do i possibly have a bad sending unit?

2

They are known to be finicky if you do not share a common ground between the gauge and sending units. So ground both in the same location. Otherwise maybe give Air-Zenith a call direct to see if they can better help you Customer Service: (702) 270-7988